If you are a psychiatry trainee in the UK or internationally, you will encounter the CASC exam as a crucial milestone in your professional development. This article provides a comprehensive definition and overview of what CASC is, why it exists, and what it assesses.
What Does CASC Stand For?
CASC stands for Clinical Assessment of Skills and Competencies. It is the clinical examination component of the MRCPsych (Membership of the Royal College of Psychiatrists) qualification, which is the professional membership examination for psychiatrists in the United Kingdom.
The CASC was introduced in 2008, replacing the previous Part II clinical examination — which used real patients and had been criticised for inconsistency between candidates. The CASC was designed to provide a more standardised, reliable, and valid assessment of clinical competence across a broad range of psychiatric scenarios, using simulated patients and structured marking criteria.
Understanding what the CASC is, how it works, and what it tests is the essential first step in any preparation plan. This guide covers everything you need to know.
The Purpose of the CASC Exam
The CASC exam serves several important purposes:
1. Assessing Clinical Competence Unlike written examinations that test theoretical knowledge, the CASC directly assesses your ability to apply knowledge in clinical situations. It evaluates how you interact with patients, gather information, formulate assessments, and communicate findings. This mirrors real-world practice — you don't just need to know what schizophrenia is, you need to be able to take a history from a person experiencing psychosis, assess their risk, explain their diagnosis, and discuss a management plan.
2. Ensuring Patient Safety By setting a minimum standard of clinical competence, the CASC helps ensure that psychiatrists who achieve MRCPsych membership are safe and effective practitioners. The exam specifically tests skills that have direct patient safety implications: risk assessment, capacity assessment, appropriate prescribing discussions, and Mental Health Act knowledge.
3. Standardised Assessment The OSCE-style format provides a standardised way to assess candidates across multiple clinical domains. Each candidate faces the same scenarios, marked against the same criteria, ensuring fairness and reliability. This is a significant improvement over the old long case/short case format where candidates might face very different clinical presentations.
4. Preparing for Independent Practice Passing the CASC demonstrates that you have the clinical skills needed for higher psychiatric training (ST4-ST6) and ultimately for independent practice as a consultant psychiatrist. Many trainees report that CASC preparation genuinely improves their clinical skills, making them better doctors as well as better exam candidates.
CASC in the MRCPsych Qualification Pathway
The MRCPsych qualification consists of three examinations that must be passed in sequence:
- MRCPsych Paper A — A written examination covering basic sciences (neuroscience, psychopharmacology, genetics, epidemiology), psychology, and psychopathology. Typically sat in CT1 or CT2.
- MRCPsych Paper B — A written examination covering clinical topics, critical appraisal, evidence-based practice, and applied clinical knowledge. Typically sat in CT2 or CT3.
- CASC — The clinical examination assessing practical skills and competencies. Most commonly sat in CT3, though some candidates sit it in ST4 or later.
You must pass Paper A and Paper B before you are eligible to sit the CASC examination. There is no time limit for completing all three components, though most trainees aim to pass all examinations during core psychiatry training (CT1-CT3) to be competitive for higher training applications (ST4 national recruitment).
How CASC Differs from the Written Papers
- Format: Papers A & B use multiple choice (EMI, SBA) — CASC uses live OSCE stations
- What's tested: Papers test knowledge recall and critical appraisal — CASC tests applied clinical skills
- Preparation: Papers require reading and question banks — CASC requires simulated practice and role-play
- Duration: Papers are 3 hours each — CASC is approximately 3 hours (16 stations)
- Key challenge: Papers test breadth of knowledge — CASC tests time pressure and performance under observation
CASC Exam Structure and Format
The CASC exam uses an Objective Structured Clinical Examination (OSCE) format. Here is how it is structured:
Overall Format
- Total stations: 16
- Circuits: 2 circuits of 8 stations each (Circuit A and Circuit B)
- Station duration: 7 minutes per station
- Reading time: 4 minutes before each station in the morning circuit; 90 seconds in the afternoon circuit
- Rest stations: None — all 8 stations in each circuit are active
- Total examination time: Approximately 2.5 to 3 hours
Station Types
Stations may be standalone or linked in pairs that share a clinical scenario. In a linked pair, the first station might involve taking a history from a patient, and the second might involve discussing your findings and management plan with a relative or colleague. The 16 stations cover a range of psychiatric presentations, patient populations, and clinical tasks.
Common station formats include: - History taking from a patient - Risk assessment - Mental state examination - Explaining a diagnosis to a patient or relative - Discussing treatment options - Capacity assessment - Discussion with a colleague (e.g., GP, social worker) - Mental Health Act discussion - Cognitive assessment
The Blueprint
The Royal College publishes an exam blueprint that specifies the coverage across: - Subspecialties: General adult, older adult, child & adolescent, learning disability, forensic, addiction, liaison psychiatry - Task types: History, examination, communication, management - Patient populations: Patients, relatives, carers, colleagues, other professionals
Not every subspecialty appears in every sitting, but over multiple sittings the exam covers the full breadth of psychiatric practice.
Setting
The exam takes place at designated test centres. Each station has a simulated patient (actor) or occasionally a surrogate examiner for discussion stations. An examiner observes and marks your performance against standardised criteria. The examiner does not interact with you during the station — they sit behind or to the side and mark in real time.
What Skills Does CASC Assess?
The CASC exam assesses the clinical skills that are essential for psychiatric practice. Examiners mark across several domains:
1. Psychiatric History Taking Gathering a comprehensive psychiatric history in a structured, empathic manner within time constraints. This includes presenting complaint, history of presenting complaint, past psychiatric and medical history, medication history, family history, personal history, social circumstances, and forensic history where relevant. Examiners look for the **funnel technique** — starting with open questions and narrowing to focused enquiry — and expect you to follow the patient's cues rather than rigidly following a checklist.
2. Mental State Examination Observing and documenting the patient's mental state, including appearance, behaviour, speech, mood, affect, thought form, thought content, perceptions, cognition, and insight. Good MSE technique is woven into the consultation rather than being a separate bolted-on exercise.
3. Risk Assessment Systematically assessing risk of suicide, self-harm, harm to others, self-neglect, and vulnerability. This is assessed in virtually every station, whether explicitly or implicitly. Examiners expect you to explore risk factors, protective factors, and to formulate a risk management plan — not just complete a risk checklist.
4. Communication Skills Explaining diagnoses, treatment options, and prognosis to patients and carers. Breaking bad news. Obtaining informed consent. Discussing sensitive topics such as capacity, detention under the Mental Health Act, and end-of-life care. **Communication is marked in every station** — even a history-taking station has a communication component. Examiners look for empathy, rapport, appropriate language, and responsiveness to the patient's emotional state.
5. Clinical Management Formulating and discussing management plans, including pharmacological and psychological treatments, referral pathways, and follow-up arrangements. Examiners want to see evidence-based management (especially NICE guidelines) delivered in a patient-centred way.
6. Specific Clinical Scenarios Capacity assessment, Mental Health Act assessments, emergency presentations, substance misuse, child and adolescent presentations, older adult psychiatry, learning disability, forensic scenarios, and neuropsychiatry.
Examiner Marking Domains
Each station is typically marked across these domains: - Communication skills — Rapport, empathy, appropriate language - Clinical skills — Completeness and accuracy of clinical assessment - Task-specific competencies — Did you address what the station required? - Global rating — Overall impression of competence
A candidate who covers all the clinical content but has poor rapport may still fail a station. Equally, a candidate who is warm and empathic but misses major clinical areas will not pass. Both dimensions matter.
Who Can Take the CASC Exam?
To be eligible to sit the CASC examination, you must:
- Be a member or affiliate of the Royal College of Psychiatrists (or have applied for affiliation)
- Have passed both MRCPsych Paper A and Paper B
- Meet the sponsorship requirements (typically through your training programme or employer)
Costs
The CASC exam fee is significant. Check the Royal College website for current fees, as they are updated annually. Budget also for travel, accommodation (if the exam centre is distant), and preparation costs (courses, materials, practice platforms).
International Medical Graduates and CASC
International medical graduates (IMGs) can sit the CASC and achieve MRCPsych membership, which is recognised worldwide as a mark of excellence in psychiatric training. A significant proportion of CASC candidates are IMGs, and many achieve excellent results.
Specific Considerations for IMGs
Language and communication: The CASC tests clinical communication in English. If English is not your first language, invest extra time in: - Practicing clinical conversations with native English speakers - Learning common British English medical phrases and patient idioms - Working on pacing — speaking clearly at a moderate pace - Understanding that patients in the UK may use colloquial terms for symptoms (e.g., "feeling low" for depression, "hearing voices" for auditory hallucinations)
Cultural context: Some stations involve culturally specific scenarios (e.g., safeguarding concerns, UK mental health legislation, GP referral pathways). Familiarise yourself with: - The Mental Health Act 1983 (amended 2007) and its practical application - UK safeguarding frameworks for children and vulnerable adults - The role of community mental health teams, crisis teams, and inpatient services - NICE guidelines for common conditions
Clinical exposure: If you are working in a non-UK system, seek opportunities to observe or work in UK psychiatric settings. Understanding the NHS care pathway — from GP referral to CMHT assessment to inpatient admission — will help you answer management questions confidently.
IMG-specific preparation tips: - Join IMG study groups — many exist online and offer mutual support and practice - Consider UK-based CASC courses that specifically cater to international candidates - Practice with British actors or colleagues who can give feedback on communication style - Focus on the practical application of UK legislation — examiners will expect you to know when and how to use a Section 2 vs Section 3, for example
CASC Pass Rates and Standards
The CASC exam uses a criterion-referenced standard-setting process (Angoff method). This means the pass mark is determined by the level of competence expected of a candidate at the end of core training, rather than by comparing candidates to each other. The pass mark can therefore vary between sittings depending on the difficulty of the stations.
Passing Requirements - You must achieve a combined score across all 16 stations that meets or exceeds the pass threshold - Performance is combined across both circuits - Each station is marked by a trained examiner using standardised mark schemes - The pass mark is set per sitting based on the expected performance of a minimally competent candidate - Borderline candidates are reviewed carefully — the exam board considers overall performance patterns
Historical Pass Rates
Historical pass rates typically range from 50% to 65% depending on the sitting. First-time pass rates are generally lower than the overall pass rate. Key factors influencing pass rates include:
- Quality and quantity of preparation (simulated practice is the strongest predictor)
- Clinical experience breadth (exposure to multiple subspecialties)
- Familiarity with exam format and time pressure
- Language and communication proficiency
The Royal College publishes examiner reports after each sitting that highlight common areas of strength and weakness. Reading these reports is valuable preparation.
Common Reasons Candidates Fail
Understanding why candidates fail helps you avoid the same pitfalls:
1. Poor Time Management Seven minutes goes faster than you think. Candidates who spend too long on the opening or on one area of the assessment run out of time before covering essential content. **Practice under timed conditions extensively.**
2. Misreading the Instructions The 90-second reading time is critical. Candidates sometimes misunderstand what the station is asking — for example, conducting a full history when the station asks you to focus only on risk assessment. **Read the instructions twice and identify the specific task.**
3. Inadequate Risk Assessment Many candidates fail to adequately assess risk, even when the station is primarily about something else. If a patient mentions suicidal thoughts during a history station, you must explore this — you cannot simply note it and move on.
4. Lack of Empathy and Rapport Candidates who are so focused on covering clinical content that they fail to respond to the patient's emotional cues will lose marks in communication domains. **Respond to emotions before continuing with questions.**
5. Insufficient Clinical Knowledge Some candidates attempt the CASC without adequate knowledge of NICE guidelines, first-line treatments, or medication side effects. The CASC is a clinical skills exam, but it requires a solid knowledge base.
6. Not Answering the Patient's Questions Simulated patients are briefed to ask certain questions. If a patient asks "Will I get better?" or "What are the side effects?", examiners expect you to address this. Ignoring patient questions damages rapport and loses marks.
7. Failing to Recover from a Difficult Station One poor station does not mean you have failed. Candidates who dwell on a difficult station and let it affect subsequent performance turn one failed station into several. **Use the reading time before the next station to reset mentally.**
How to Prepare for CASC
Effective preparation for the CASC requires a structured, multi-faceted approach:
Phase 1: Foundation Building (3-6 months before the exam) - **Revise core knowledge**: Psychiatric diagnoses (ICD-11), NICE guidelines for common conditions, psychopharmacology (mechanisms, side effects, interactions), Mental Health Act, Mental Capacity Act - **Learn structured frameworks**: History taking frameworks, risk assessment structure, MSE format, SPIKES for breaking bad news, capacity assessment structure, Calgary-Cambridge model for communication - **Read examiner reports**: Available from the Royal College website — these reveal common areas of weakness
Phase 2: Active Practice (2-3 months before the exam) - **Simulated practice with peers**: Form study groups and practice role-playing stations. One person is the candidate, one is the patient, and one is the examiner providing feedback - **Formal CASC courses**: Many courses are available in the UK and internationally. Look for courses that offer realistic simulated practice with experienced examiners - **AI-powered practice platforms**: Platforms like CASC AI provide unlimited practice with realistic simulated patients and structured feedback, available 24/7. This is particularly valuable for candidates who cannot easily access peer practice groups - **Video self-review**: Record yourself doing practice stations and review your performance. This reveals habits you may not be aware of (speaking too quickly, poor eye contact, not responding to emotional cues)
Phase 3: Refinement (final 2-4 weeks) - **Full mock exams**: Practice 8 or 16 stations in sequence under timed conditions to build exam stamina - **Target weak areas**: Use feedback from practice to identify and focus on your weakest station types - **Exam logistics**: Confirm your exam date, venue, and travel arrangements. Visit the venue in advance if possible - **Mental preparation**: Develop strategies for managing anxiety, recovering from difficult stations, and maintaining performance across all 16 stations
Key Preparation Principles
- Quality over quantity: One well-practiced station with detailed feedback is worth more than five rushed practice runs without feedback
- Breadth of practice: Don't just practice your favourite station types — cover all the common scenarios including those you find difficult
- Realistic conditions: Practice under timed conditions with someone you don't know well playing the patient — this simulates the real exam more accurately than practising with a close friend
- Feedback is essential: Self-assessment alone is insufficient. Seek structured feedback from experienced clinicians, CASC examiners, or calibrated AI feedback systems
Frequently Asked Questions
How many times can I attempt the CASC? You can attempt the CASC up to six times. If you do not pass within six attempts, you may need to restart the MRCPsych examination process from Paper A.
Can I sit the CASC outside the UK? The CASC has previously been offered internationally at certain centres (e.g., in South Asia). Check the Royal College website for current international sittings.
What happens if I fail one circuit but pass the other? Performance is combined across both circuits. You cannot pass one circuit independently — the overall combined score must meet the pass threshold.
Is there negative marking? No. There is no penalty for attempting a station and performing poorly. Always attempt every station and aim to demonstrate whatever skills you can within the time.
Can I use notes during the station? You can take the instruction sheet into the station and refer to it. Some candidates jot brief notes during the reading time. You cannot take textbooks or other reference materials.
What should I wear? Dress professionally as you would for a clinical setting. Smart business attire is expected. Avoid overly casual clothing.
Do I need to examine patients physically? The CASC is a psychiatric clinical exam. Physical examination is very rarely required. If a station involves physical observations (e.g., noting extrapyramidal side effects), instructions will make this clear.
Summary
The CASC — Clinical Assessment of Skills and Competencies — is the clinical examination required for MRCPsych membership. It is a 16-station OSCE that assesses your ability to perform as a competent psychiatrist across a wide range of clinical scenarios, from history taking and risk assessment through to breaking bad news and capacity assessment.
Passing the CASC is a significant achievement that demonstrates your readiness for higher training and ultimately for independent practice in psychiatry. The exam is demanding — requiring both clinical knowledge and interpersonal skill under time pressure — but with systematic preparation, it is entirely achievable.
The most important preparation strategies are: practice under realistic timed conditions, seek structured feedback, cover the full breadth of station types, and learn from examiner reports. Whether you use peer practice groups, formal courses, or AI-powered practice platforms, the key is consistent, deliberate practice with honest reflection.
By understanding what the CASC is and what it assesses, you can focus your preparation on building the clinical skills that examiners are looking for — and ultimately become a better psychiatrist in the process.