Medical Licensing (MD/DO) · Independent exam preparation
MRCPsych Preparation Guide: 2026 Written Syllabus and CASC Study Guide
Practise psychiatric assessment, medication safety and evidence appraisal across Paper A, Paper B and CASC, using the MRCPsych syllabus applicable through 2026.
By CertMedbry · Updated 27 October 2026
Distinguish psychiatric presentations, explain medication hazards, interpret research results and translate assessment into a collaborative management plan. These 60 selected concepts cover every listed domain across the MRCPsych pathway, with additional emphasis on neuroscience, psychopharmacology, general adult psychiatry and critical review. The official written curriculum, critical review supplement and CASC blueprint define the full scope; this selective guide supports study across them. Its written-examination mapping applies through December 2026.
Try 20 free practice questionsWhat is the exam format?
Check the question types, timing and outline before planning your revision.
Which examination pathway and professional level does this guide cover?
It covers the Royal College of Psychiatrists' MRCPsych Examinations: Paper A, Paper B and CASC. These are complementary components of one postgraduate membership pathway. MRCPsych is not a primary medical licensing examination. Passing all components and meeting the required psychiatric experience supports an application for College membership.
MRCPsych Exams: Eligibility Criteria and Regulations, 27 May 2026
How many questions and marks are in each written paper?
For 2026, Paper A and Paper B each contain 150 questions, carry 150 marks and last three hours.
Which written question styles and delivery arrangements should candidates prepare for?
Each written paper comprises approximately two-thirds multiple-choice questions and one-third extended matching item questions. The College provides guidance and a sample examination for taking Papers A and B online; consult its current instructions for operational arrangements. The 20 four-option questions here are independent learning drills and do not reproduce the complete written format or assess CASC performance.
How is Paper A weighted through December 2026?
Paper A allocates 16.67% each to Behavioural Science and Socio-cultural Psychiatry, Human Development, and Classification and Assessment in Psychiatry; Basic Neurosciences and Clinical Psychopharmacology each receive 25%. The published percentages total 100.01% because of rounding. These are Paper A allocations, not percentages of the complete MRCPsych pathway.
How is Paper B weighted through December 2026?
Paper B allocates 33.5% to Critical Review, 20% to General Adult Psychiatry, 9% each to Old Age Psychiatry and Child and Adolescent Psychiatry, 6.5% to Substance Misuse/Addictions, and 5.5% each to Organisation and Delivery of Psychiatric Services, Psychotherapy, Forensic Psychiatry, and Psychiatry of Learning Disability. The College describes approximately one-third critical review and two-thirds clinical topics.
What does CASC assess, and how are its stations timed and distributed?
The CASC blueprint published in March 2023 and applicable from September 2023 specifies 16 seven-minute stations: five history, five examination and six management stations. Reading periods are four minutes in the first session and 90 seconds in the second. Communication is assessed throughout. Every running order includes risk assessment or safety planning, cognition or capacity, and physical history or examination. Specialty matrix percentages indicate minimum frequency across running orders; they are not overall mark weights. Check current College guidance for operational updates.
MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint · Royal College of Psychiatrists: Preparing for the CASC
Which syllabus dates apply, and what changes in January 2027?
Candidates sitting written examinations through December 2026 should use the current curriculum last updated February 2021 and critical review supplement updated May 2011. The College has published a revised theory syllabus applying from January 2027. Paper A changes from five to four domains, including a combined psychology and human development domain. Candidates sitting from January 2027 should use the revised official syllabus. This guide retains the 2026 domain mapping.
Royal College of Psychiatrists: Preparing for exams · Syllabic curriculum content: Summary of Areas of Core Medical Knowledge Underpinning Specialist Training in Psychiatry · MRCPsych Paper B Critical Review – Evidence-Based Practice Syllabic Content
How should the guide's coverage be interpreted?
The 60 concepts sample all 14 written domains and four CASC skill areas: history taking, examination, patient management and communication. The official written curriculum, critical review supplement and CASC blueprint define the full scope. Written coverage approximately follows weights within each paper while retaining smaller domains. Each component has its own allocations. The question and flashcard sets provide selected practice, and their results do not predict passing.
Royal College of Psychiatrists: Preparing for exams · MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint
MRCPsych is a postgraduate psychiatric College membership examination pathway comprising Paper A, Paper B and CASC, structured around UK Core Psychiatry training. Passing the components and meeting the required psychiatric experience supports an application for College membership. These independently authored learning materials are not College-endorsed.
Outline used: Verified for examinations applicable on 2026-10-10: written syllabic curriculum last updated February 2021; Paper B critical review supplement updated May 2011; CASC syllabus published March 2023, effective September 2023. The College directs candidates to use the current written syllabus through December 2026 and announces revised Paper A/B syllabi effective January 2027. The workbook label maps to the College's MRCPsych Examinations, comprising Paper A, Paper B and CASC, leading towards College membership; the assigned slug is preserved.
60 key concepts: understand, apply and avoid the traps
Work through the questions by exam domain. Explain the answer in your own words, try the example, then check the common pitfall.
Behavioural Science and Socio-cultural Psychiatry16.67% of Paper A
1.How does negative reinforcement maintain avoidance?
Negative reinforcement occurs when removing or preventing an aversive experience increases a behaviour. A person who avoids a feared situation experiences immediate anxiety relief, making future avoidance more likely. The defining feature is the behaviour becoming more frequent because something unpleasant is removed. This differs from punishment, which reduces behaviour. Identifying the immediate consequence helps explain why an action persists despite longer-term restriction or distress.
Apply it
A patient leaves a supermarket whenever their heart races. Their anxiety quickly falls, and they increasingly avoid shopping. Identify anxiety relief as the consequence maintaining escape, then use that formulation when explaining a collaboratively planned behavioural intervention.
Common pitfall: The word negative describes removal, not harm or moral judgement. Calling every unpleasant consequence negative reinforcement confuses it with punishment and obscures the maintaining mechanism.
2.Why can an extinguished fear response return?
In classical conditioning, extinction occurs when the conditioned stimulus repeatedly appears without the unconditioned stimulus and the conditioned response diminishes. Extinction does not necessarily erase the original association. Spontaneous recovery describes the return of a previously extinguished response after a pause. The discriminating cue is the interval after successful extinction, rather than a fresh pairing with the original aversive event. A returning response therefore need not imply that earlier learning never occurred.
Apply it
A person becomes less fearful of a harmless tone after repeated presentations without a loud noise. Mild fear returns after a week without practice. Explain spontaneous recovery rather than assuming a new conditioning event occurred during the interval.
Common pitfall: Do not equate a reduced response with permanent deletion of learning. Conversely, renewed fear after a genuinely new aversive pairing requires a different explanation.
3.How does attribution bias distort clinical judgements?
The fundamental attribution error is a tendency to overemphasise personal characteristics when explaining another person's behaviour and underemphasise situational influences. In psychiatry, describing a missed appointment as laziness can conceal transport problems, fear, poverty or cognitive difficulty. A useful assessment distinguishes observed behaviour from its proposed explanation. Competing explanations should be tested against contextual information before a personality judgement becomes part of the formulation or influences access to care.
Apply it
A clinician calls a patient unreliable after two missed visits. Further enquiry reveals that the appointment times overlap with an unpredictable caring responsibility. Revise the explanation and discuss a practical attendance arrangement before attributing the pattern to character.
Common pitfall: Considering context does not mean assuming every behaviour is situational. The error is prematurely privileging a trait explanation without examining credible alternative causes.
4.How should cultural context inform symptom interpretation?
Cultural context influences how distress is expressed, which explanations feel credible and how help is sought. Assessment should establish the person's own meaning, relevant community norms and the relationship between an experience and impaired functioning. A belief's unfamiliarity to the clinician does not establish psychopathology. Equally, describing an experience as culturally meaningful does not resolve questions about distress, danger or coexisting illness. Individual enquiry is more informative than assumptions based on group membership.
Apply it
A patient describes hearing a deceased relative during mourning. Ask what the experience means, whether it is expected in their community, whether it is distressing and whether other changes have occurred before assigning a psychotic symptom label.
Common pitfall: Neither unfamiliarity nor cultural endorsement settles the diagnosis alone. Stereotyping a person's beliefs from ethnicity can be as misleading as ignoring culture entirely.
Human Development16.67% of Paper A
5.What distinguishes secure attachment during reunion?
Secure attachment describes a pattern in which a caregiver provides a reliable base for exploration and a source of comfort when the child is distressed. During reunion after separation, a securely attached infant typically seeks or accepts comfort and can return to exploration. Separation distress alone does not distinguish secure from insecure attachment. The quality of reunion behaviour is more informative. Attachment patterns describe relationships and behaviour under particular conditions, rather than fixed predictions of an individual's future.
Apply it
An infant cries when a caregiver leaves, approaches them on return, settles with contact and resumes playing. Interpret the recovery and renewed exploration as evidence of a secure pattern rather than treating the initial crying as pathological.
Common pitfall: A securely attached child can show marked separation distress. Avoid diagnosing an attachment disorder or predicting adult personality from one brief observation of reunion behaviour.
6.Which reunion cues distinguish insecure attachment patterns?
In an avoidant attachment pattern, a child may show limited overt proximity seeking and avoid the caregiver on reunion. In a resistant or ambivalent pattern, the child may strongly seek contact yet resist soothing and remain difficult to settle. Disorganised behaviour lacks a coherent strategy and may include contradictory or confused responses. These observational classifications should be distinguished from clinical attachment disorders. Interpretation requires developmental and relational context rather than a simple equation between behaviour and parental intent.
Apply it
During a structured reunion, a toddler reaches towards a caregiver but then pushes them away and remains distressed. Compare this contact-seeking yet resistant pattern with avoidance, while gathering broader developmental information before drawing a clinical conclusion.
Common pitfall: Limited visible distress does not prove secure attachment. Observational insecurity also does not, by itself, establish abuse, an attachment disorder or an inevitable later psychiatric outcome.
7.How does concrete thinking affect communication?
Piaget's historical model distinguishes concrete operations, involving logical reasoning about tangible situations, from formal operations, involving abstract and hypothetical reasoning. Its clinical value is to prompt assessment of how a person understands an explanation. Concrete examples, demonstrations and checking understanding may work better than abstract analogies. Development is variable, and stage labels are not diagnostic tests. The person's demonstrated reasoning should guide communication more directly than an assumed ability based only on chronological age.
Apply it
A child cannot explain an abstract probability statement but understands a demonstration using coloured counters. Use the concrete demonstration to discuss uncertainty and ask the child to explain the idea back in their own words.
Common pitfall: Historical developmental stages are useful models, not rigid age rules. Difficulty with an abstract explanation may reflect language, education or anxiety rather than global cognitive impairment.
OpenStax Psychology 2e: Stages of Development · Syllabic curriculum content: Summary of Areas of Core Medical Knowledge Underpinning Specialist Training in Psychiatry
8.Why does developmental context change a formulation?
A developmental formulation considers how biological maturation, relationships, opportunities and adversity interact over time. Similar events may have different meanings at different life stages: separation, bereavement or loss of work can affect identity and support in different ways. Vulnerability and resilience are not mutually exclusive traits. A person may face substantial adversity while retaining protective relationships or effective coping. The discriminating task is to connect timing and context to the individual's current response without assuming a deterministic developmental pathway.
Apply it
Two adults experience retirement differently: one gains valued social roles, while the other loses their main source of identity and contact. Explore these differences when formulating distress instead of attributing the response to age alone.
Common pitfall: An adverse childhood event does not explain every later symptom. Developmental accounts should identify plausible links and protective factors rather than replace assessment of current illness.
Basic Neurosciences25% of Paper A
9.Which glial cells myelinate central and peripheral axons?
Oligodendrocytes form myelin around axons in the central nervous system, while Schwann cells provide myelin in the peripheral nervous system. Myelin electrically insulates axonal segments and supports rapid impulse conduction. An oligodendrocyte can contribute myelin to multiple axonal segments, whereas a myelinating Schwann cell forms one segment around one peripheral axon. Astrocytes provide other supportive functions, and microglia have immune surveillance and phagocytic roles. Location and function distinguish these cells.
Apply it
A teaching slide shows one glial cell extending processes to several myelinated axonal segments within brain tissue. Identify an oligodendrocyte, using the central location and multiple processes rather than choosing a cell solely because it supports neurons.
Common pitfall: Schwann cells and oligodendrocytes share a myelinating function but occupy different compartments. Astrocytic support of the neural environment does not make astrocytes the myelin-forming cells.
10.What produces the rapid upstroke of an action potential?
Once an axonal membrane reaches threshold, voltage-gated sodium channels open and sodium enters down its electrochemical gradient. This inward current rapidly depolarises the membrane and opens further sodium channels, producing regenerative positive feedback. Sodium channel inactivation and delayed potassium conductance then help end the upstroke and repolarise the membrane. The sodium-potassium pump maintains ionic gradients over time, but it does not directly generate the rapid depolarising phase of each action potential.
Apply it
An experimental compound blocks voltage-gated sodium channels in an axon. Predict impaired initiation or propagation of action potentials because the regenerative inward sodium current is reduced, even though the sodium-potassium pump can still maintain ionic gradients.
Common pitfall: Do not attribute the millisecond upstroke to the sodium-potassium pump. Maintaining concentration gradients and opening channels for rapid ion flow are different physiological processes.
11.Why does an axon have a refractory period?
During the absolute refractory period, many voltage-gated sodium channels are inactivated and cannot immediately reopen, preventing another action potential regardless of stimulus strength. During the relative refractory period, some channels have recovered, but continuing potassium conductance and membrane hyperpolarisation make excitation harder. A stronger stimulus may then trigger another impulse. This distinction helps explain limits on firing frequency and why a recently activated membrane segment does not immediately support backward regeneration of the same impulse.
Apply it
An axon fails to respond to a second strong stimulus immediately after firing but responds to a stronger-than-usual stimulus slightly later. Explain the transition from sodium-channel inactivation to a relative refractory period with reduced excitability.
Common pitfall: The relative refractory period does not mean firing is impossible. Conversely, simply increasing stimulus strength cannot overcome sodium-channel inactivation during the absolute refractory period.
12.Which memory deficit points towards hippocampal dysfunction?
The hippocampus is important for forming and consolidating new explicit memories, including memories of events and facts. Damage can produce severe difficulty establishing new declarative memories while leaving some previously acquired memories and procedural learning relatively preserved. This pattern distinguishes memory systems rather than implying that all memory is stored in one structure. A patient who improves at a motor task without remembering previous practice demonstrates a dissociation between procedural learning and explicit recollection.
Apply it
After bilateral medial temporal injury, a patient repeatedly forgets new conversations but improves across sessions on a tracing task. Explain the contrast as impaired new explicit memory with relatively preserved procedural learning, rather than concluding that no learning occurs.
Common pitfall: Poor recall does not mean every memory system has failed. Avoid treating the hippocampus as the permanent storage location for all knowledge and learned skills.
OpenStax Psychology 2e: Parts of the Brain Involved with Memory
13.How does the amygdala influence emotional memory?
The amygdala contributes to processing emotional significance and to the influence of emotion on learning and memory. Emotionally arousing experiences may be remembered differently from neutral experiences because emotional processing interacts with other memory systems. This differs from the hippocampus's contribution to forming new explicit memories. Strong emotional salience does not guarantee that every remembered detail is accurate. In assessment, emotional intensity and factual reliability should therefore be considered separately rather than treated as interchangeable measures.
Apply it
A learner remembers the emotional impact of a frightening event vividly but gives inconsistent peripheral details. Use the distinction between emotional salience and accurate explicit detail when explaining why confidence alone cannot establish the precision of every memory.
Common pitfall: Do not equate vividness with a perfect record. The amygdala influences emotional learning; it does not provide a complete, independently verified account of an event.
OpenStax Psychology 2e: Parts of the Brain Involved with Memory
14.How does myelin accelerate impulse conduction?
Myelin insulates axonal segments so that local current spreads efficiently towards gaps called nodes of Ranvier. Action potentials are regenerated at these nodes rather than continuously along every part of the covered membrane. This saltatory pattern supports faster conduction than comparable unmyelinated axons. Myelin does not make the impulse travel by a separate non-electrical process, and action potentials still depend on ion channels. The crucial relationship is insulation between nodes combined with regeneration at exposed membrane.
Apply it
A diagram shows insulated axonal segments separated by short gaps rich in voltage-gated channels. Explain that current spreads beneath the insulation and action potentials regenerate at the gaps, linking the structure to rapid saltatory conduction.
Common pitfall: An impulse does not literally leave the axon and leap through space. Myelin improves current spread, while nodal membrane channels regenerate the action potential.
OpenStax Anatomy and Physiology 2e: Nervous Tissue · OpenStax Anatomy and Physiology 2e: The Action Potential
Clinical Psychopharmacology25% of Paper A
15.Why can an NSAID increase lithium exposure?
Lithium is cleared through the kidneys, so changes in renal handling can alter its concentration without a change in the prescribed dose. NSAIDs can reduce renal blood flow and lithium clearance, increasing lithium exposure and the risk of toxicity. This is a pharmacokinetic interaction rather than a shared receptor effect. A newly started non-prescription painkiller is therefore relevant to an apparent deterioration on a previously stable lithium regimen and should prompt medication reconciliation and clinical review.
Apply it
A patient stable on lithium begins regular ibuprofen for back pain and develops worsening tremor. Identify the new analgesic as a possible contributor to reduced lithium clearance and arrange assessment rather than assuming the maintenance dose remains safe.
Common pitfall: An unchanged lithium prescription does not imply unchanged exposure. Do not explain this interaction as inhibition of hepatic lithium metabolism; renal clearance is the relevant mechanism.
NHS: Taking lithium with other medicines and herbal supplements · DailyMed: Lithium carbonate capsule prescribing information
16.Which changes suggest lithium toxicity?
Lithium toxicity can produce gastrointestinal symptoms together with neurological changes such as worsening tremor, muscle weakness, confusion, drowsiness or difficulty speaking. A new cluster or progression of symptoms is more concerning than an isolated stable minor adverse effect. Suspected toxicity requires stopping lithium and urgent medical assessment, rather than waiting for a routine appointment or adjusting the dose casually. Intercurrent illness and interacting medicines help explain why toxicity may arise during an established treatment regimen.
Apply it
A patient taking lithium develops diarrhoea, a markedly worse tremor and slurred speech. Treat the combination as possible toxicity: stop lithium and obtain urgent medical assessment, bringing the medication history and recent illness details into the evaluation.
Common pitfall: Do not normalise new neurological impairment as an expected maintenance effect. A previous satisfactory lithium concentration cannot establish safety after an illness or interaction.
17.Why can smoking cessation raise clozapine concentrations?
Components of tobacco smoke induce drug-metabolising enzymes, including CYP1A2, which contributes to clozapine metabolism. When smoking stops, this induction diminishes, so clozapine exposure can rise at an unchanged dose. The interaction is driven by smoke constituents rather than nicotine itself. Admission to a smoke-free setting is therefore a medication-safety transition. Changes in smoking status require communication with the prescribing team, assessment for adverse effects and appropriate concentration monitoring and dose review.
Apply it
A patient enters a smoke-free ward and uses nicotine replacement while continuing clozapine. Recognise that nicotine replacement does not preserve tobacco-smoke enzyme induction, and ensure the prescribing team reviews exposure and emerging adverse effects after smoking cessation.
Common pitfall: Do not assume nicotine replacement prevents this interaction. Restarting smoking can move exposure in the opposite direction, so discharge plans also need the smoking history.
MHRA: Smoking and smoking cessation—clinically significant interactions with commonly used medicines
18.Which bowel symptoms during clozapine treatment require emergency assessment?
Clozapine-associated gastrointestinal hypomotility can cause fatal faecal impaction, obstruction or paralytic ileus. Persistent moderate-to-severe abdominal pain or discomfort lasting over an hour, abdominal distension, vomiting, overflow diarrhoea, absent bowel sounds or sepsis features require immediate emergency assessment. Overflow diarrhoea can indicate impaction rather than recovery. Without emergency features, constipation still requires active treatment: if no bowel movement has occurred for two days, exclude intestinal obstruction and begin appropriate laxative treatment. SPS recommends a stimulant, adding an osmotic laxative or stool softener if needed, and avoiding bulk-forming laxatives in this hypomotility setting.
Apply it
A patient taking clozapine reports constipation followed by a swollen abdomen, persistent pain and watery stool leakage. Arrange immediate emergency assessment for possible impaction or obstruction. For constipation without these features, assess promptly, exclude obstruction and actively treat while monitoring response.
Common pitfall: Do not interpret diarrhoea as proof that the bowel is clear or let routine blood monitoring substitute for bowel assessment. Emergency features require assessment without waiting to see whether a laxative works.
MHRA: Clozapine—reminder of potentially fatal gastrointestinal complications · Managing constipation in people taking clozapine – NHS SPS - Specialist Pharmacy Service – The first stop for professional medicines advice
19.How does half-life inform concentration changes?
For a drug following first-order elimination, half-life is the time taken for its concentration to decrease by half during elimination. Repeated halving explains why stopping a medicine does not remove it immediately and why repeated dosing produces accumulation. The interpretation assumes stable pharmacokinetics; altered clearance can change the pattern. Half-life describes concentration behaviour, not a guarantee that clinical benefit or adverse effects begin or end at the same time as a particular concentration change.
Apply it
A hypothetical drug has a 12-hour half-life under stable first-order conditions. Starting from a concentration of 80 units after dosing has ceased, estimate 40 units after 12 hours and 20 units after 24 hours, while stating the assumptions.
Common pitfall: A half-life is not the time required for complete elimination. Do not apply repeated halving unchanged when clearance is nonlinear or substantially altered by disease.
20.How do affinity and intrinsic activity differ?
Affinity describes a drug's tendency to bind to a receptor, whereas intrinsic activity describes its ability to activate that receptor after binding. An antagonist may bind without activating the receptor and block an agonist's effect. A partial agonist produces less maximal activation than a full agonist in the same system and can reduce the effect of a competing full agonist. Binding strongly therefore does not establish either maximal receptor activation or a particular clinical benefit.
Apply it
In a receptor experiment, a compound binds avidly but produces a smaller maximum response than a full agonist. Identify partial agonism, and predict that competition with a full agonist could lower the overall response in that experimental system.
Common pitfall: High affinity does not mean high efficacy. A receptor-binding result alone cannot determine clinical effectiveness, which also depends on exposure, receptor context and other drug actions.
Classification and Assessment in Psychiatry16.67% of Paper A
21.What distinguishes a hallucination from an illusion?
A hallucination is a perception-like experience without a corresponding external stimulus. An illusion is a misinterpretation of an actual stimulus, such as mistaking a hanging coat for a person in poor light. Assessment should clarify sensory modality, circumstances, meaning and associated symptoms rather than infer diagnosis from the perceptual label alone. The key discriminating question is whether a relevant external stimulus was present, not simply whether the experience was vivid, frightening or unusual.
Apply it
A patient sees a threatening figure in a dark hallway, then recognises a coat when the light is switched on. Clarify that the coat supplied an external stimulus, making an illusion the more accurate descriptive term.
Common pitfall: A perceptual abnormality does not establish schizophrenia by itself. Do not classify an experience solely from its emotional impact without clarifying whether an external stimulus existed.
Syllabic curriculum content: Summary of Areas of Core Medical Knowledge Underpinning Specialist Training in Psychiatry · National Institute of Mental Health: Schizophrenia
22.Which findings are negative symptoms?
Negative symptoms describe reductions in normal functions, including diminished emotional expression, reduced speech, reduced motivation and reduced pleasure or social engagement. They differ from positive symptoms such as hallucinations and delusions, which add abnormal experiences. Similar outward findings can also occur with depression, medication effects or other conditions. Descriptive assessment should identify the observed deficit and then explore its cause. Reduced facial expression, for example, is an observation rather than proof of a specific diagnosis.
Apply it
A patient speaks little and initiates few activities after an acute psychotic episode. Describe the reduced speech and motivation, then assess mood, medication effects and the longitudinal course before assuming the presentation represents enduring primary negative symptoms.
Common pitfall: Social withdrawal is not synonymous with a negative symptom syndrome. Fear, depression, sedation and limited opportunities can produce similar behaviour and require different explanations.
23.How should disorganised thought be assessed through speech?
Thought organisation is inferred partly from the structure and connections of speech. Disorganised thinking may appear as difficulty maintaining a coherent train of thought or making understandable connections between ideas. This differs from an unusual belief, which concerns thought content. The examiner should obtain examples and consider language proficiency, communication differences and context before labelling pathology. A clear distinction between form and content improves mental state description and prevents a striking belief from obscuring how the person actually communicates.
Apply it
A patient expresses a highly unusual belief in an otherwise coherent, goal-directed account. Record the belief under thought content rather than calling the speech disorganised merely because the account's central claim appears implausible to the interviewer.
Common pitfall: Unusual content does not automatically indicate disordered thought form. Avoid interpreting second-language hesitancy or unfamiliar expressions as evidence of disrupted associative thinking without further clarification.
National Institute of Mental Health: Schizophrenia · Syllabic curriculum content: Summary of Areas of Core Medical Knowledge Underpinning Specialist Training in Psychiatry
24.Why does a diagnosis need an individual formulation?
Diagnostic classification groups presentations according to shared features and supports communication, but it does not fully explain an individual's illness. Formulation connects biological, psychological and social factors with onset, persistence and protection. Two people with the same diagnosis may therefore need different management priorities. A useful formulation identifies plausible links and modifiable factors rather than merely listing background information. Diagnostic terminology should also identify the classification system being used when criteria or labels differ between systems.
Apply it
Two patients share a psychosis diagnosis. One has recurrent medication interruptions related to adverse effects; the other has stable treatment but major housing insecurity. Use the formulation to select different immediate management targets despite the shared diagnostic category.
Common pitfall: A diagnosis is neither a complete causal explanation nor an individual care plan. Conversely, a persuasive formulation should not bypass careful descriptive assessment and diagnostic reasoning.
Organisation and Delivery of Psychiatric Services5.5% of Paper B
25.When can crisis resolution support treatment at home?
Crisis resolution and home treatment services provide intensive support during an acute mental health crisis and may help some people receive care outside hospital. Suitability depends on the person's needs, safety, available support and ability to engage with the proposed care. The service choice follows assessment rather than diagnosis alone. Home treatment is not simply a routine outpatient appointment delivered elsewhere; its purpose is a coordinated response to a level of need that requires more intensive crisis support.
Apply it
A person with worsening psychosis needs frequent review but can engage with treatment, has a workable home environment and agrees to a clear crisis plan. Consider crisis resolution assessment while checking whether the proposed support can meet their current needs.
Common pitfall: Avoid treating home care as automatically suitable because a bed is undesirable. Equally, a psychosis diagnosis alone does not determine that admission is required.
26.How does multidisciplinary care address functional recovery?
Multidisciplinary community care combines professional contributions around the person's psychiatric, physical and social needs. Medication response is one part of recovery; housing, daily living, occupation, relationships and psychological support may remain important even when acute symptoms improve. Effective coordination makes responsibilities explicit and connects interventions to agreed goals. The discriminating principle is matching expertise to an identified need rather than assuming that adding more professionals automatically produces an integrated or useful plan.
Apply it
A patient has fewer hallucinations but cannot manage shopping or sustain accommodation. Develop coordinated goals involving relevant community professionals, and specify who will address daily living skills and housing rather than making symptom reduction the sole marker of progress.
Common pitfall: Multiple referrals can fragment care when nobody coordinates them. Do not confuse a long professional contact list with shared goals, clear responsibilities and meaningful functional improvement.
General Adult Psychiatry20% of Paper B
27.Which changes suggest a high-mood episode?
A high-mood episode may involve unusually elevated or irritable mood together with increased energy or activity, reduced need for sleep, increased talkativeness, racing thoughts and impulsive behaviour. Reduced need for sleep means feeling able to function on much less sleep, rather than wanting sleep but being unable to obtain it. The clinical task is to establish change from baseline, the cluster of associated symptoms, functional consequences and possible alternative explanations, including substances or medicines.
Apply it
A normally cautious adult begins sleeping three hours without tiredness, launches several projects and spends beyond their means. Explore a high-mood episode using collateral and longitudinal history rather than interpreting the short sleep as an isolated insomnia complaint.
Common pitfall: High energy alone is insufficient. Do not assign a manic or hypomanic diagnosis without considering course, impairment, associated symptoms and the classification criteria being applied.
28.When should persistent psychosis prompt consideration of clozapine?
Offer clozapine for schizophrenia that has not responded adequately despite sequential trials of two different antipsychotics at adequate doses and for adequate durations. At least one previous treatment should be a non-clozapine second-generation antipsychotic. NHS England guidance describes each trial as lasting 6–8 weeks, with clinical judgement informing adequacy. Before concluding that symptoms represent treatment resistance, review the diagnosis, actual adherence, prescribed and taken doses, duration, tolerability, substance use, concurrent medicines and physical illness that could contribute to apparent nonresponse. Two drug names in a record do not establish two adequate trials. Once these criteria are established, discuss clozapine through shared decision-making, explaining expected benefits, contraindications, monitoring requirements and adverse-effect responsibilities.
Apply it
A person with schizophrenia continues to experience distressing voices and delusions after sequential eight-week trials of risperidone and olanzapine at adequate therapeutic doses. Adherence is documented, and diagnostic review and assessment of substance use and physical illness identify no alternative explanation for nonresponse. These findings support offering clozapine. By comparison, risperidone stopped after three days and an olanzapine prescription never collected would not establish the same treatment-resistance criterion.
Common pitfall: Do not omit dose adequacy or the requirement for at least one non-clozapine second-generation antipsychotic. Poor adherence and insufficient exposure can produce apparent resistance. Conversely, repeatedly switching antipsychotics after two genuinely adequate unsuccessful trials can delay an indicated clozapine offer.
Royal College of Psychiatrists: Psychosis · NHS England » Early Intervention in Psychosis: Recording and reporting on NICE-recommended interventions using SNOMED CT codes
29.How should a depressive presentation be distinguished from unipolar depression?
A depressive presentation can include persistent low mood or loss of interest alongside changes in energy, sleep, appetite, concentration and self-worth. Establish the symptom cluster, time course, functional impairment and any thoughts of death or self-harm. The current depressive symptoms alone do not distinguish unipolar depression from bipolar depression. Ask specifically about previous periods of elevated or irritable mood, increased activity, reduced need for sleep and impulsive behaviour, including episodes the person experienced as productive rather than problematic. Medicines, substances and physical illness also belong in the assessment.
Apply it
An adult presents with low mood, loss of pleasure and declining function. They initially deny previous mental illness but describe an earlier period of very little sleep without fatigue, unusually ambitious projects and damaging spending. Assess possible bipolar illness before treating the current presentation as established unipolar depression.
Common pitfall: Do not classify every depressive episode as unipolar because the person currently appears slowed and withdrawn. A history of past high mood may emerge only through specific questions and collateral information.
NHS: Bipolar disorder · Syllabic curriculum content: Summary of Areas of Core Medical Knowledge Underpinning Specialist Training in Psychiatry
30.How do obsessions and compulsions form a maintaining cycle?
Obsessions are distressing intrusive thoughts, images or urges, while compulsions are repetitive actions or mental acts performed in response. A ritual may temporarily reduce distress, strengthening the tendency to repeat it when the obsession returns. Assessment should identify both visible and mental rituals, including reassurance seeking where relevant. The treatment target is the relationship between feared experiences and ritualised responding, rather than simply the unusual content of a thought. Collaborative explanation makes exposure and response prevention more understandable.
Apply it
A patient repeatedly reviews memories to prove they did not harm someone, obtaining only brief relief. Identify the mental reviewing as a possible compulsion and map its link to intrusive doubt before discussing an exposure and response prevention approach.
Common pitfall: Compulsions are not always observable washing or checking. Repeated reassurance can become part of the cycle even when it feels like a compassionate way to settle distress.
31.How can early warning signs support bipolar relapse prevention?
Relapse prevention involves recognising an individual's pattern of mood change and agreeing what to do when early warning signs appear. Changes in sleep, activity or behaviour can be useful when compared with that person's baseline and previous episodes. A plan should connect a recognisable change to a practical response and identify available support. General advice becomes more actionable when personalised. An isolated variation does not establish relapse, but a familiar cluster should prompt timely assessment rather than passive observation.
Apply it
A patient identifies reduced sleep and increasing online spending as features preceding previous high-mood episodes. Agree how they and a trusted supporter will recognise that pattern, contact the care team and review the existing relapse plan.
Common pitfall: Avoid promising that a warning-sign plan prevents every episode. Do not treat ordinary enthusiasm or a single poor night's sleep as diagnostic without the wider pattern.
Old Age Psychiatry9% of Paper B
32.Which quiet presentation should raise concern for delirium?
Delirium is an acute change in mental functioning characterised by fluctuating confusion and impaired attention. Some people become restless, but others become unusually quiet, withdrawn or drowsy. A calm appearance therefore does not exclude significant acute illness. The most discriminating clues are a change over hours or days, fluctuation and departure from baseline. Assessment should look for underlying physical causes and contributing factors rather than treating the altered behaviour as a primary psychiatric diagnosis.
Apply it
An older inpatient becomes unusually sleepy and cannot sustain a conversation after being alert the previous day. Seek evidence of acute fluctuating inattention and physical illness instead of interpreting the absence of agitation as evidence against delirium.
Common pitfall: Hypoactive delirium can be missed when staff associate delirium only with agitation. Quietness and cooperation do not establish normal cognition or medical stability.
33.What distinguishes a dementia assessment from interpreting one low cognitive score?
Assessment for dementia establishes acquired cognitive decline from the person's previous abilities and its consequences for everyday functioning. Ask for concrete changes in managing medicines, money, travel and familiar activities, and obtain collateral information about onset and progression. A persistent decline over months or years differs from the acute fluctuating inattention of delirium. Consider mood, physical illness, medicines and sensory or language barriers when interpreting performance. The pattern of affected abilities and neurological or physical findings informs further differentiation; a total screening score alone cannot establish the cause.
Apply it
A family describes a year of worsening memory, missed bills and getting lost on familiar routes. Establish the functional decline and chronology, assess cognition under accessible conditions and evaluate alternative contributors. A sudden deterioration during this course still requires assessment for superimposed delirium.
Common pitfall: Normal ageing, depression, delirium and dementia cannot be distinguished by a single score. A dementia diagnosis also does not explain every later acute change.
Syllabic curriculum content: Summary of Areas of Core Medical Knowledge Underpinning Specialist Training in Psychiatry · NHS Royal Devon: Delirium (acute confusion)
Psychotherapy5.5% of Paper B
34.How does exposure and response prevention address OCD?
Exposure and response prevention involves approaching feared thoughts or situations while refraining from the compulsive responses usually used to neutralise distress. Treatment is planned collaboratively and commonly proceeds through manageable challenges, with practice between sessions. Its active element is learning to face the feared experience without relying on the ritual. Repeated therapist reassurance or an alternative neutralising act can undermine that aim. The task is not to force an immediate absence of anxiety or prove absolute safety.
Apply it
A patient fears contamination after touching a shared door handle. Agree a manageable exposure and a plan to resist the usual washing ritual, then review what happened during practice rather than repeatedly assuring them that contamination is impossible.
Common pitfall: Exposure accompanied by a substitute ritual may preserve the maintaining cycle. Do not make treatment success depend on anxiety disappearing immediately during every practice attempt.
35.How does a cognitive formulation make a thought testable?
A cognitive formulation links a situation, the person's interpretation, emotional and bodily responses, and subsequent behaviour. Negative automatic thoughts are immediate appraisals rather than objective descriptions of an event. Making an appraisal explicit allows collaborative examination of evidence and alternative explanations. A behavioural test is most informative when it addresses a specific prediction with an observable outcome. Cultural context and the person's actual circumstances matter; therapy should not presume that every distressing interpretation is simply irrational.
Apply it
After an unanswered message, a patient predicts that a friend will refuse all future contact. Clarify the prediction, consider alternative explanations and agree a proportionate way to observe what happens, instead of debating whether the patient is being reasonable.
Common pitfall: Cognitive work is not compulsory positive thinking. Dismissing a realistic concern can damage collaboration; the task is to examine the interpretation and its consequences accurately.
Child and Adolescent Psychiatry9% of Paper B
36.Which DSM-based criteria make an ADHD assessment diagnostically specific?
In the DSM-based approach described by NIMH, symptoms of inattention and/or hyperactivity-impulsivity must persist for at least six months, be inconsistent with developmental level and impair functioning. Children through age 16 require at least six symptoms in the relevant nine-symptom cluster; people aged 17 or older require at least five. Combined presentation requires the threshold in both clusters. Several symptoms must have been present before age 12, several must occur in at least two settings, and there must be clear interference with functioning. Assess alternative explanations and coexisting conditions. These thresholds belong to this identified framework and should not be assumed identical across classification systems.
Apply it
A 12-year-old has seven inattentive symptoms for nine months, with impairing difficulties at home and school and similar symptoms documented before age 12. Establish each symptom and its impact, assess the hyperactive-impulsive cluster and consider alternatives before deciding whether the DSM-based criteria are met.
Common pitfall: Childhood onset does not require that the diagnosis itself was made before age 12. A questionnaire score, a brief period of restlessness or difficulties confined to one setting cannot establish the full criteria.
National Institute of Mental Health: Attention-Deficit/Hyperactivity Disorder—What You Need to Know
37.How should school refusal be assessed as a presentation?
School refusal describes an attendance problem and requires assessment of its causes and context. Establish what the young person fears or finds difficult, when distress begins, whether particular lessons or relationships are involved and what happens when attendance is avoided. Explore anxiety, low mood, bullying or safeguarding concerns, learning and developmental needs, and physical symptoms or illness. Obtain the young person's account alongside caregiver and school observations. Immediate relief after staying home may maintain avoidance, but that mechanism does not identify the original problem or establish a particular anxiety diagnosis.
Apply it
A young person develops abdominal discomfort before school and settles after being allowed to stay home. Assess physical health and ask privately about feared situations, peer relationships and safety. Use the attendance timeline and school information to guide support rather than concluding that symptom relief proves deliberate absence.
Common pitfall: Do not treat refusal as a diagnosis or assume all school-related distress is misconduct. An avoidance cycle can coexist with bullying, illness or unmet learning needs that require direct action.
Syllabic curriculum content: Summary of Areas of Core Medical Knowledge Underpinning Specialist Training in Psychiatry · OpenStax Psychology 2e: Operant Conditioning
Substance Misuse/Addictions6.5% of Paper B
38.When should alcohol-related illness raise concern for Wernicke's encephalopathy?
Wernicke's encephalopathy is a serious consequence of thiamine deficiency, particularly relevant when harmful alcohol use is accompanied by poor nutrition. Confusion, gait disturbance and eye movement abnormalities are important clues, but the full classical triad may be absent. Suspected disease requires urgent medical treatment with parenteral thiamine according to the clinical pathway. Waiting for every classical sign risks delay. The key decision is recognising a treatable neurological emergency rather than attributing all altered behaviour to intoxication or withdrawal.
Apply it
A poorly nourished person with heavy alcohol use presents with new confusion and an unsteady gait but no obvious eye signs. Raise concern for Wernicke's encephalopathy and arrange urgent medical treatment rather than waiting for the complete triad.
Common pitfall: Absence of one classical feature does not exclude Wernicke's encephalopathy. Do not assume oral supplementation or a routine later review is sufficient for suspected acute disease.
39.Which alcohol withdrawal features require urgent escalation?
Alcohol withdrawal can progress beyond tremor and anxiety to seizures or delirium tremens. Risk assessment includes the recent change in alcohol intake, previous complicated withdrawal, physical illness and current observations. Delirium, seizures or marked physiological disturbance require urgent medical assessment and monitored treatment. The absence of ongoing drinking does not mean the immediate danger has passed, because symptoms can emerge after reduction or cessation. Withdrawal care should also assess nutrition and other alcohol-related complications.
Apply it
After abruptly reducing longstanding heavy drinking, a patient develops tremor and then a seizure. Escalate urgently for medical management of complicated withdrawal, while communicating the alcohol history and checking for coexisting illness instead of arranging an unmonitored community detoxification.
Common pitfall: Do not equate successful cessation with immediate medical safety. Confusion during withdrawal needs assessment for delirium and other causes, rather than reassurance that discomfort is expected.
Forensic Psychiatry5.5% of Paper B
40.How do changing factors improve violence risk formulation?
An individualised violence risk formulation combines relevant history with current symptoms, substance use, relationships, access to potential victims or means, and protective factors. Historical events establish context, while changing factors identify opportunities for intervention and reassessment. Collateral information can reveal discrepancies or recent escalation. The useful output is a reasoned account of plausible scenarios and actions that could reduce danger, not a categorical prediction based solely on diagnosis or a single numerical score.
Apply it
A patient with previous violence has resumed heavy drinking and made new threats towards a named neighbour. Update the formulation using the recent changes, seek relevant collateral and connect each identified concern to a specific management response.
Common pitfall: Past violence matters but does not describe current circumstances alone. A reassuring interview or risk score should not erase credible collateral evidence of escalating threats.
Psychiatry of Learning Disability5.5% of Paper B
41.How does functional assessment guide positive behaviour support?
Functional assessment examines what happens before a behaviour, the behaviour itself and what follows it, alongside the person's communication, health and environment. Behaviour may communicate distress or achieve an outcome such as escaping an overwhelming task. Positive behaviour support uses that understanding to modify conditions and teach more effective ways to meet needs. A new behavioural change also warrants assessment for pain, illness or psychiatric difficulties. The person's learning disability should not become an automatic explanation for every presentation.
Apply it
A young person repeatedly leaves a noisy activity and becomes calmer in a quiet room. Explore sensory demands, communication and possible physical discomfort, then adapt the activity and teach an accessible request for a break rather than responding only to the leaving.
Common pitfall: Describing behaviour as challenging does not explain its function. Avoid assuming deliberate misconduct or prescribing a solution before examining antecedents, consequences, communication and physical health.
North Derbyshire NHS CAMHS: Learning Disabilities Team · Syllabic curriculum content: Summary of Areas of Core Medical Knowledge Underpinning Specialist Training in Psychiatry
Critical Review33.5% of Paper B
42.How does PECO(t) sharpen a clinical question?
PECO(t) specifies the patient or population, exposure or intervention, comparison, outcome and time. It converts a broad uncertainty into a question whose evidence requirements can be judged. A therapy question might compare relapse rates over a stated follow-up period, whereas a qualitative question might explore experiences of care. The outcome should matter to the clinical decision, and the comparison should be explicit. A well-formed question also makes it easier to recognise evidence that concerns a different population or endpoint.
Apply it
Replace 'Does therapy work?' with a question about adults with a specified disorder, a named therapy, a defined comparator and relapse over one year. Check that any study considered addresses those elements before applying its result.
Common pitfall: A precisely stated intervention is insufficient if population, comparator or outcome remains vague. An improvement in a convenient surrogate may not answer the patient's actual question.
MRCPsych Paper B Critical Review – Evidence-Based Practice Syllabic Content
43.Which study design best matches the clinical uncertainty?
Study design should follow the question. Randomised trials can estimate intervention effects while reducing confounding through allocation; cohorts can examine prognosis and follow exposures forward; case-control studies compare prior exposures in people with and without an outcome. Cross-sectional studies describe a population at a point in time but may leave temporal order uncertain. Qualitative methods address experiences and meanings that numerical effect estimates cannot capture. A hierarchy applied without considering the question can therefore select the wrong evidence.
Apply it
A team wants to understand why patients experience a service transition as frightening. Choose an appropriate qualitative approach to explore meaning and context, rather than assuming a randomised trial is required merely because it is often strong evidence for treatment effects.
Common pitfall: No single design is best for every question. Observing an association in a cross-sectional sample does not establish which variable preceded the other or prove causation.
MRCPsych Paper B Critical Review – Evidence-Based Practice Syllabic Content
44.How do absolute risk reduction and NNT relate?
For an undesirable outcome, absolute risk reduction is the control risk minus the intervention risk over a specified period. The number needed to treat is the reciprocal of that absolute reduction expressed as a proportion. It estimates how many similar patients would need treatment for one additional person to avoid the outcome during that period. Baseline risk and follow-up matter, so an NNT should not be detached from the population, comparator or outcome used to calculate it.
Apply it
In an original example, relapse occurs in 30% of controls and 20% receiving treatment over one year. The absolute reduction is 0.10 and the NNT is 10 for preventing one additional relapse over that year.
Common pitfall: Do not calculate NNT from a percentage written as 10 rather than 0.10. Relative risk reduction alone cannot determine the absolute benefit without baseline risk.
Cochrane Handbook, Chapter 15: Interpreting results and drawing conclusions
45.Which denominators define sensitivity and specificity?
Sensitivity is the proportion of people with the target condition who test positive: true positives divided by all those with the condition. Specificity is the proportion without the condition who test negative: true negatives divided by all those without it. Both definitions condition on reference-standard disease status. They answer different questions from predictive values, which condition on the test result. Building a two-by-two table and naming the denominator prevents a common reversal of these measures.
Apply it
Among 100 people with a condition, 85 test positive; among 200 without it, 180 test negative. Calculate sensitivity as 85% and specificity as 90%, using the disease-status groups rather than the totals of positive or negative results.
Common pitfall: A highly sensitive test does not mean most positive results represent disease. That claim concerns positive predictive value and also depends on the tested population.
Department of Health and Social Care: Technologies Validation Group—using tests to detect COVID-19
46.Why does prevalence alter positive predictive value?
Positive predictive value is the proportion of positive results that are true positives. If sensitivity and specificity remain constant, testing a lower-prevalence population generally produces fewer true positives relative to false positives, reducing positive predictive value. The same test result therefore need not carry the same probability of disease in every setting. Interpretation should connect the test's performance with the pretest context. This is distinct from assuming that sensitivity itself is simply the proportion of positive results that are correct.
Apply it
A test with 90% sensitivity and 90% specificity is used in 1,000 people, 100 of whom have the condition. Expect 90 true positives and 90 false positives, giving a positive predictive value of 50%.
Common pitfall: Do not transfer predictive values unchanged between populations with different prevalence. Even a useful test can generate many false positives when the target condition is uncommon.
MRCPsych Paper B Critical Review – Evidence-Based Practice Syllabic Content · Department of Health and Social Care: Technologies Validation Group—using tests to detect COVID-19
47.How should a confidence interval change interpretation?
A confidence interval describes uncertainty around an estimated effect under the study's statistical assumptions. Its width helps judge precision, while its range shows whether clinically important benefit, little effect or harm remains compatible with the data. For a risk ratio, the no-effect value is one; for a risk difference, it is zero. An interval crossing the no-effect value does not prove equivalence. Clinical interpretation should consider the whole range rather than reduce the result to a significant-or-nonsignificant label.
Apply it
A trial estimates a risk ratio of 0.80 with a 95% confidence interval from 0.50 to 1.28. Explain that substantial benefit and some harm remain compatible with the estimate, so the study has not established equivalence or a precise treatment effect.
Common pitfall: A nonsignificant result is not evidence of no effect. Statistical precision also cannot correct systematic bias or guarantee that an effect matters to patients.
Cochrane Handbook, Chapter 15: Interpreting results and drawing conclusions
48.Why is allocation concealment needed before randomisation?
Allocation concealment prevents people recruiting participants from knowing or predicting the next treatment assignment before enrolment is complete. Without it, recruitment decisions can alter group composition even if the assignment sequence was originally random. Concealment addresses selection into groups, whereas blinding after allocation addresses other biases, including outcome assessment influenced by treatment knowledge. A random number list is therefore not sufficient evidence that allocation was protected. The mechanism used to implement assignments must also be examined.
Apply it
A recruiter can view the next treatment on an open allocation list and delays enrolling a particularly unwell patient. Identify compromised allocation concealment and possible selection bias, even though a computer originally generated the assignment sequence randomly.
Common pitfall: Random sequence generation and concealment are separate safeguards. Blinding an outcome assessor later cannot undo selective enrolment caused by predictable assignments at recruitment.
Cochrane Handbook, Chapter 8: Assessing risk of bias in a randomized trial
49.How does intention-to-treat analysis preserve a trial comparison?
Intention-to-treat analysis compares participants according to their original randomised groups, regardless of subsequent adherence or treatment switching. This preserves the intended comparison created by randomisation and estimates the effect of assignment to an intervention strategy. Excluding nonadherent participants can introduce differences related to prognosis. Missing outcomes remain a separate problem: calling an analysis intention-to-treat does not make absent data harmless. The extent, reasons and handling of missingness, including sensitivity analyses, still require appraisal.
Apply it
Some participants assigned therapy attend few sessions and others switch treatment. Retain their original assignments in an intention-to-treat comparison, while separately examining missing outcomes and whether reasonable alternative assumptions would change the study's conclusions.
Common pitfall: Do not equate intention-to-treat with analysing only participants who completed treatment. It also does not guarantee an unbiased estimate when outcome data are substantially missing.
Cochrane Handbook, Chapter 8: Assessing risk of bias in a randomized trial · MRCPsych Paper B Critical Review – Evidence-Based Practice Syllabic Content
50.How does incremental cost-effectiveness differ from low cost?
An economic evaluation compares costs and consequences between alternatives. An incremental cost-effectiveness ratio divides the additional cost by the additional outcome achieved, such as quality-adjusted life years in cost-utility analysis. A cheaper intervention is not necessarily more cost-effective if it produces substantially poorer outcomes. Opportunity cost describes the benefits forgone when resources are committed to one option rather than another. Interpretation requires a defined perspective, comparator and time horizon, together with examination of uncertainty in the assumptions.
Apply it
A hypothetical service costs £2,000 more per patient and generates 0.10 additional quality-adjusted life years. Its incremental ratio is £20,000 per QALY. Calculate the ratio without assuming that the number alone establishes the service's acceptability or affordability.
Common pitfall: Cost-effectiveness is not synonymous with saving money. Avoid importing a decision threshold without an identified policy context, or ignoring which costs and outcomes were included.
MRCPsych Paper B Critical Review – Evidence-Based Practice Syllabic Content
CASC: History Taking5 of 16 CASC stations
51.How does a symptom timeline improve psychiatric history taking?
A symptom timeline connects baseline functioning, onset, progression, associated changes and previous episodes. It helps distinguish a sudden deterioration from a longstanding pattern and identifies possible relationships with substances, medicines or life events. Begin with the person's account, then clarify dates and examples without turning the consultation into an interrogation. The discriminating information is often a change from usual functioning rather than the presence of a symptom word. A summary should check that the sequence has been understood correctly.
Apply it
A patient reports being 'confused for ages'. Ask what they could do previously, when others first noticed a change and whether symptoms fluctuate. Summarise the sequence back before moving to differential explanations or a management discussion.
Common pitfall: A list of symptoms without chronology can conceal the decisive clinical distinction. Do not force uncertain dates into a falsely precise timeline or overlook the patient's priorities.
MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint
52.When does collateral history add decisive information?
Collateral history can establish baseline abilities, recent behavioural change and events the patient cannot recall or interpret fully. It is especially useful when cognition, insight or the reliability of a timeline is uncertain. Identify the informant's relationship, opportunities to observe and specific examples rather than accepting a global judgement. Explain the purpose and address consent and confidentiality appropriately to the situation. Disagreement should be explored as information about differing observations, not automatically resolved by privileging one account.
Apply it
A patient says their memory is unchanged, while a partner reports several recent episodes of getting lost. Ask for dates, circumstances and previous navigation ability, then compare both accounts to clarify whether there is a meaningful functional change.
Common pitfall: Collateral is not automatically accurate or comprehensive. An informant's distress, limited contact or different expectations can influence their account and should be considered explicitly.
MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint
53.Why should a psychiatric history include recent medicine changes?
A complete medication history includes prescribed treatment, non-prescription medicines, recent additions or omissions and changes in relevant habits. These details can explain altered exposure or symptoms that resemble psychiatric deterioration. Ask what the person actually takes rather than relying solely on a prescription list. Linking the timing of a change to the onset of symptoms helps identify a testable explanation. Physical illness and adverse effects should be explored alongside psychiatric symptoms rather than added only after a diagnostic conclusion.
Apply it
A patient taking lithium reports new shaking after buying a painkiller. Ask the product name, frequency, timing and associated symptoms, then connect that history to possible interaction and toxicity assessment instead of recording only prescribed psychiatric medicines.
Common pitfall: A medication list is not a medication history. Over-the-counter products and actual adherence can be decisive even when the formal prescription record has not changed.
MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint · NHS: Taking lithium with other medicines and herbal supplements
CASC: Examination5 of 16 CASC stations
54.How should a cognitive examination be interpreted in context?
A cognitive examination samples abilities such as attention, orientation and memory, but performance must be interpreted alongside baseline functioning, language, education, sensory access and current illness. Difficulty hearing instructions can resemble impaired comprehension, while acute inattention can undermine later memory tasks. Explain the task and ensure the person can access it before drawing conclusions. A score is a summary of observed performance, not a complete diagnosis. The pattern and time course of difficulties remain central to interpretation.
Apply it
An older patient repeatedly fails spoken tasks in a noisy room and has misplaced hearing aids. Improve communication conditions before interpreting the results, while still assessing whether an acute change in attention or functioning needs medical investigation.
Common pitfall: Do not infer a specific cognitive disorder from a total score alone. Adjusting access to instructions improves assessment quality; it does not justify ignoring genuine impairment.
MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint · NHS Royal Devon: Delirium (acute confusion)
55.How is decision-specific capacity assessed in England and Wales?
Under the Mental Capacity Act framework for England and Wales, presume capacity and provide practicable support, such as accessible explanations, communication aids and an appropriate time and setting. Assess four abilities for the particular decision now: understanding ('What are the options and their main consequences?'); retention ('Can you tell me the key information again while deciding?'); use or weighing ('How do those benefits and risks affect your choice?'); and communication ('Which option do you choose?', using speech, signs or another reliable method). Establish whether any inability results from an impairment or disturbance of mind or brain. Record the supporting evidence and causal link; diagnosis or an unwise choice alone is insufficient.
Apply it
A patient with delirium declines a proposed investigation. Explain its purpose, alternatives and consequences with appropriate support. Assess all four abilities and whether delirium causes an inability to decide. If the investigation can safely wait, consider reassessment when the person's attention improves.
Common pitfall: Capacity is decision-specific and time-specific. Short retention can suffice if information is held long enough to decide, and communication need not be verbal. Agreement with the clinician does not establish capacity.
Making decisions: a guide for people who work in health and social care - GOV.UK · MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint
56.How should physical examination inform assessment of abdominal symptoms during clozapine treatment?
Explain the examination, obtain consent and preserve privacy. Assess the person's general condition and physiological observations, inspect for abdominal distension and examine the abdomen, including bowel sounds. Integrate findings with the duration and severity of pain, bowel history, vomiting and possible overflow diarrhoea. Distension, absent bowel sounds, persistent moderate-to-severe pain, vomiting or sepsis features during clozapine treatment require immediate emergency assessment. Examination should identify urgency and guide escalation; it should not become a reason to delay transfer when red flags are already present.
Apply it
A patient taking clozapine has abdominal swelling, vomiting and persistent pain. Assess immediate physical stability, perform a focused examination where feasible and arrange emergency assessment for possible obstruction or ileus. Communicate the medicine, bowel history and examination findings clearly.
Common pitfall: Little reported pain does not establish safety, and a reassuring isolated finding cannot exclude serious gastrointestinal hypomotility. Do not substitute a psychiatric mental state examination for assessment of an acute physical complication.
Managing constipation in people taking clozapine – NHS SPS - Specialist Pharmacy Service – The first stop for professional medicines advice · MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint
CASC: Patient Management6 of 16 CASC stations
57.How does formulation determine management priorities?
A management formulation explains how the main problems, maintaining factors, strengths and immediate safety concerns connect. It should produce priorities rather than repeat the history. An urgent physical complication may require action before a longer-term psychological intervention, while persistent social barriers may undermine an otherwise reasonable treatment plan. State why each intervention addresses an identified problem and how its effect will be reviewed. A holistic plan is coherent when biological, psychological and social actions serve the person's actual needs.
Apply it
A patient has persistent psychotic symptoms, distressing treatment effects and unstable accommodation. Explain how each problem influences engagement, agree immediate priorities and assign follow-up responsibilities rather than delivering an undifferentiated list of medication, therapy and social referrals.
Common pitfall: A long plan can still lack clinical reasoning. Avoid attaching standard interventions to every case without explaining their purpose, urgency, feasibility and relationship to the person's goals.
MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint
58.What makes a safety plan usable during deterioration?
A usable safety plan connects personalised warning signs with actions the person and others can realistically take. It identifies sources of support, how to seek urgent help and what should trigger reassessment or escalation. The plan should reflect the person's circumstances and communication needs, with understanding checked rather than assumed. Risk changes over time, so review arrangements matter. A plan is more informative when it specifies who will do what than when it merely records that safety advice was given.
Apply it
A patient identifies escalating sleeplessness and threatening messages as signs of deterioration. Agree specific contact routes, supportive actions and circumstances requiring urgent reassessment, then ask the patient to describe how they would use the plan outside the consultation.
Common pitfall: A generic emergency contact list is not a complete safety plan. Do not assume a plan is workable without checking access, willingness and the availability of support.
MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint
59.How should best-interests management proceed after capacity is found lacking in England and Wales?
Under the Mental Capacity Act, establish lack of capacity for the particular decision after practicable support. Consider whether capacity may return and whether the decision can safely wait. Before proceeding with treatment, check for a valid and applicable advance decision refusing that treatment: best interests cannot override a binding advance refusal under this framework. Establish whether a registered health and welfare attorney or Court of Protection deputy has relevant decision-making authority, checking its scope and restrictions. Within that authority, the attorney or deputy makes the decision using best interests; otherwise, the treating clinician normally makes the treatment decision. Involve the person, consider their wishes, beliefs and values, consult appropriate people and compare feasible options, including less restrictive approaches. For qualifying nonurgent NHS serious-treatment decisions, the responsible NHS body must instruct an IMCA before deciding when no appropriate person is available to consult; paid staff alone do not satisfy this safeguard. A relevant authorised attorney or deputy removes this mandatory IMCA requirement. Emergency treatment need not wait solely for an IMCA, and treatment provided under the Mental Health Act is an exception to this MCA IMCA duty. The IMCA represents the person and informs the decision, but does not make it. Document authority, consultation and reasoning.
Apply it
An adult with temporary confusion lacks capacity to decide about a nonurgent procedure. First consider waiting for recovery and check for a binding advance refusal and any relevant attorney or deputy. A valid, applicable refusal prevents the refused treatment under the MCA even if clinicians consider it beneficial. If there is no refusal or authorised substitute decision-maker, and the proposed procedure qualifies as NHS serious medical treatment, absence of an appropriate person to consult requires an IMCA before the decision. The clinician then weighs the available evidence and the IMCA's report when determining best interests.
Common pitfall: A relative has no automatic authority to consent, while an attorney or deputy with relevant powers is more than a consultee. A financial attorney does not thereby acquire treatment authority. Do not treat a binding advance refusal as merely one preference to balance, or describe mandatory IMCA involvement as optional. Urgency does not itself cancel an otherwise binding advance refusal.
Making decisions: a guide for people who work in health and social care - GOV.UK · MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint
CASC: CommunicationAssessed in all 16 CASC stations; separate percentage not stated
60.How should an emotional cue change the consultation?
An emotional cue is information about what matters to the person and may signal a concern that has not yet been stated directly. Pause, acknowledge what has been noticed and invite clarification without assuming its meaning. The response should then influence the explanation or plan where relevant. Respectful communication combines empathy with clear, accurate information; reassurance is useful only when it addresses the actual concern. Checking understanding and inviting questions help reveal whether the conversation has met the person's needs.
Apply it
When treatment monitoring is mentioned, a patient becomes quiet and looks away. Acknowledge the change and ask what worries them. Their previous frightening hospital experience may require a different explanation and practical support before planning can continue.
Common pitfall: Stock reassurance can close down disclosure. Do not interpret silence automatically as agreement, lack of interest or refusal without giving the person space to explain.
MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint
What to focus on during revision
The following are CertMedbry study suggestions. Use the official outline to check the full scope of your examination.
- For Paper A, explain neuronal mechanisms and drug exposure changes before memorising associations; neuroscience and psychopharmacology each account for 25%.
- For Paper B, practise critical review calculations and appraisal alongside clinical cases; Critical Review carries 33.5% and General Adult Psychiatry 20%.
- Contrast commonly confused observations: reinforcement versus punishment, illusion versus hallucination, reduced sleep need versus insomnia, and delirium versus chronic cognitive impairment.
- Link medication hazards to mechanisms and action: renal lithium interactions, tobacco-smoke induction and clozapine gastrointestinal hypomotility.
- Retain smaller written domains through focused cases involving services, psychotherapy, developmental assessment, addictions, violence risk and learning disability.
- Practise CASC history, examination and management as observable consultations, integrating communication, physical health, cognition or capacity, and risk or safety planning.
A practical preparation plan
1. Match the syllabus to the sitting date
Use the 2026 written domains for examinations through December 2026. For a sitting from January 2027, begin with the College's published revised theory syllabus and remap the study plan before using this guide's domain allocations.
2. Build a mechanism-and-discriminator notebook
For each concept, write the mechanism, the observation that distinguishes it from its nearest alternative and one consequence for assessment or management. Add missing topics from the full official outline rather than treating these 60 selections as exhaustive.
3. Study each written paper according to its own weights
Give Paper A neuroscience and psychopharmacology substantial repeated practice. In Paper B, reserve frequent sessions for critical review and general adult cases while maintaining scheduled coverage of every smaller specialty.
4. Calculate before interpreting
Construct two-by-two tables, label denominators and calculate absolute effects using proportions. State the population, comparator, outcome and follow-up period before interpreting an NNT, predictive value or confidence interval.
5. Review errors by competing explanation
Complete the 20 questions independently, then explain why each alternative is less appropriate. Record whether an error arose from missing the decisive cue, confusing a mechanism, using the wrong denominator or assuming unsupported information.
6. Rehearse the CASC skill sequence
Rotate history, examination and management practice in a pattern reflecting five, five and six stations. Ask a practice partner to assess clarity, response to cues and personalisation throughout; include physical health, cognition or capacity, and risk or safety planning across sessions.
Use your sample score as a starting point
The free set contains 20 original practice questions. It is a small learning sample, not an official examination or a validated pass prediction. Review each explanation and its source before moving to another topic.
Start the free sampleOfficial sources and updates
- Royal College of Psychiatrists: Preparing for exams
- Syllabic curriculum content: Summary of Areas of Core Medical Knowledge Underpinning Specialist Training in Psychiatry
- MRCPsych Paper B Critical Review – Evidence-Based Practice Syllabic Content
- MRCPsych Clinical Assessment of Skills and Competencies: Syllabus and Blueprint
- Royal College of Psychiatrists: Preparing for the CASC
- MRCPsych Exams: Eligibility Criteria and Regulations, 27 May 2026
- OpenStax Psychology 2e: Operant Conditioning
- OpenStax Psychology 2e: Classical Conditioning
- OpenStax Psychology 2e: Stages of Development
- OpenStax Anatomy and Physiology 2e: Nervous Tissue
- OpenStax Anatomy and Physiology 2e: The Action Potential
- OpenStax Psychology 2e: Parts of the Brain Involved with Memory
- NHS: Taking lithium with other medicines and herbal supplements
- DailyMed: Lithium carbonate capsule prescribing information
- NHS: Side effects of lithium
- MHRA: Smoking and smoking cessation—clinically significant interactions with commonly used medicines
- MHRA: Clozapine—reminder of potentially fatal gastrointestinal complications
- National Institute of Mental Health: Schizophrenia
- Royal College of Psychiatrists: Psychosis
- NHS: Treatment—Schizophrenia
- NHS: Bipolar disorder
- NHS Royal Devon: Delirium (acute confusion)
- NHS: Treatment—Obsessive compulsive disorder
- National Institute of Mental Health: Attention-Deficit/Hyperactivity Disorder—What You Need to Know
- Department of Health and Social Care: Clinical guidelines for alcohol treatment—Alcohol care in acute hospitals
- Royal College of Psychiatrists: Assessing risk
- North Derbyshire NHS CAMHS: Learning Disabilities Team
- Cochrane Handbook, Chapter 15: Interpreting results and drawing conclusions
- Cochrane Handbook, Chapter 8: Assessing risk of bias in a randomized trial
- Department of Health and Social Care: Technologies Validation Group—using tests to detect COVID-19
- 12.1 What Is Social Psychology? - Psychology 2e | OpenStax
- Managing constipation in people taking clozapine – NHS SPS - Specialist Pharmacy Service – The first stop for professional medicines advice
- Making decisions: a guide for people who work in health and social care - GOV.UK
- Cost utility analysis: health economic studies - GOV.UK
- Preparing for the CASC
- Considering drug interactions with smoking – NHS SPS - Specialist Pharmacy Service – The first stop for professional medicines advice
- NHS England » Early Intervention in Psychosis: Recording and reporting on NICE-recommended interventions using SNOMED CT codes
Confirm current eligibility, fees, scheduling and policies directly with the examination provider. CertMedbry is independent and is not endorsed by these organisations. How we handle content and corrections.