Mastering History Taking in the CASC Exam: A Complete Guide

History taking is the single most tested skill in the MRCPsych CASC examination. Approximately 30-40% of stations will require some form of psychiatric history taking, making it the most important competency to master. Research into CASC outcomes consistently identifies history taking as the area where the gap between passing and failing candidates is most apparent.

Why History Taking Matters in CASC

The CASC exam assesses your ability to gather clinical information in a structured, empathic, and time-efficient manner. Examiners are looking for candidates who can:

• Establish rapport quickly and maintain it throughout the consultation
• Use a logical structure that covers all essential areas without appearing robotic
• Demonstrate active listening through appropriate verbal and non-verbal cues
• Integrate risk assessment naturally into the conversation
• Manage time effectively within the 7-minute station format
• Adapt their approach when the patient is guarded, hostile, tearful, or over-talkative
• Demonstrate clinical reasoning by following up on significant cues rather than rigidly following a script

Examiners mark using structured rating scales that typically assess three domains: communication skills, clinical content coverage, and clinical judgement. Your history taking must score well across all three to pass.

The Structured Approach Examiners Expect

A well-structured psychiatric history follows a predictable but flexible framework. The key word is flexible — your structure should be a scaffold, not a cage. The best candidates adapt their approach based on what the patient tells them.

1. Opening (30-60 seconds) - Introduce yourself clearly with name and role: "Good morning, my name is Dr Smith, I'm one of the psychiatrists here" - Clarify the purpose of the consultation: "I understand you've been referred by your GP because of some difficulties you've been having" - Use an open question: "Could you tell me what's been troubling you?" - Allow the patient to speak without interruption for at least 30 seconds - Use attentive body language: lean forward slightly, maintain comfortable eye contact, nod appropriately

Examiner tip The opening 30 seconds sets the tone for the entire station. Candidates who rush into closed questions immediately are marked down on rapport. Allow a brief silence after your open question — it signals you are genuinely listening, not just waiting to ask your next question.

The Funnel Technique: Open to Closed

The funnel technique is the gold standard for psychiatric interviewing and the approach examiners expect:

Level 1 — Open questions (first 60-90 seconds): "Tell me about what's been happening" / "How have things been for you recently?" These allow the patient to set the agenda and reveal what matters most to them.

Level 2 — Focused probing (next 2-3 minutes): "You mentioned feeling anxious — can you tell me more about that?" / "When you say you've not been sleeping, what does a typical night look like?" These target specific areas the patient has raised.

Level 3 — Closed confirmatory questions (final 1-2 minutes): "Have you had any thoughts of harming yourself?" / "Are you hearing voices that others can't hear?" These fill gaps in your assessment and screen for key symptoms you must not miss.

Moving too quickly to Level 3 is the single most common reason candidates lose marks in history taking stations.

History of Presenting Complaint (2-3 minutes)

• Explore the presenting complaint in detail using the patient's own words
• Use the SOCRATES framework for symptoms when applicable: Site, Onset, Character, Radiation, Associated features, Timing, Exacerbating/relieving factors, Severity
• Clarify onset, duration, severity, and progression: "When did you first notice this?" / "Has it been getting worse, better, or staying the same?"
• Ask about precipitating and relieving factors: "Was there anything happening in your life around the time this started?"
• Screen for associated symptoms across relevant domains (biological, psychological, social)
• Explore functional impact: "How has this affected your day-to-day life? Your work? Your relationships?"

Screening Questions by Diagnosis

In many CASC stations, you will need to screen for a particular diagnostic category. Having a core set of screening questions memorised for each major condition saves time and ensures you cover the essentials.

Depression Screening - Core symptoms: low mood, anhedonia (loss of interest or pleasure), fatigue/loss of energy - "How has your mood been recently?" / "Are you still able to enjoy things you used to enjoy?" / "How are your energy levels?" - Biological symptoms: sleep disturbance (early morning waking is classic), appetite change, weight change, reduced libido, diurnal mood variation, psychomotor changes - Cognitive symptoms: poor concentration, indecisiveness, guilt, worthlessness, hopelessness - Always screen for psychotic features in severe depression: nihilistic delusions, auditory hallucinations (typically second person, derogatory)

Psychosis Screening - Positive symptoms: hallucinations (modality, content, frequency, impact), delusions (type, conviction, impact on behaviour) - "Have you had any unusual experiences recently?" / "Have you heard or seen things that others might not?" / "Have you had any thoughts or beliefs that others have found unusual?" - Negative symptoms: social withdrawal, flattened affect, poverty of speech, amotivation, self-neglect - First-rank symptoms (Schneider): auditory hallucinations (third person, running commentary, thought echo), thought insertion/withdrawal/broadcasting, passivity phenomena, delusional perception

Mania/Hypomania Screening - "Have there been times when you've felt unusually high, on top of the world, or full of energy?" - Explore: reduced need for sleep (vs. insomnia), increased activity, pressure of speech, grandiosity, overspending, disinhibition, reduced appetite with weight loss - Ask about consequences: financial problems, relationship difficulties, risk-taking behaviour

Anxiety Screening - "Do you find yourself feeling anxious or worried a lot of the time?" - Psychological symptoms: excessive worry, apprehension, irritability, difficulty concentrating - Physical symptoms: palpitations, sweating, tremor, dry mouth, breathing difficulties, chest tightness, GI symptoms - Avoidance behaviours: "Are there situations you avoid because of anxiety?" - Screen for specific anxiety disorders: panic attacks (sudden onset, crescendo in 10 minutes), social anxiety, specific phobias, GAD (chronic, free-floating worry)

OCD Screening - "Do you experience thoughts that come into your mind repeatedly that you find distressing or hard to control?" - "Do you find yourself having to do certain things repeatedly, such as checking, washing, or counting?" - Explore: ego-dystonic nature, time spent, functional impact, resistance efforts - Screen for related conditions: body dysmorphic disorder, hoarding

Past Psychiatric & Medical History (1 minute)

• Previous episodes: "Have you experienced anything like this before?" — explore number, timing, treatments, and outcomes
• Previous psychiatric admissions: voluntary or involuntary, duration, what helped
• Medication history: current medications (name, dose, duration, adherence, side effects), previous medications tried and reasons for stopping
• Psychological treatments: type (CBT, psychodynamic, etc.), when, how many sessions, perceived benefit
• Relevant medical comorbidities: thyroid disease, neurological conditions, chronic pain, recent head injury, epilepsy
• Allergies and adverse drug reactions

Risk Assessment Integration (1-2 minutes)

• Thoughts of self-harm or suicide (screen in every station — this is non-negotiable)
• Use transitional phrases: "You've told me things have been very difficult. When people feel this way, they sometimes have thoughts about harming themselves or ending their life. Has anything like that crossed your mind?"
• If positive, explore further: ideation, intent, plan, means, preparatory acts, protective factors
• Risk to others if clinically indicated: "Have you ever felt so angry or frustrated that you've thought about hurting someone else?"
• Self-neglect concerns: nutrition, hydration, personal hygiene, living conditions
• Safeguarding issues: vulnerable adults, children in the household
• Substance use and its relationship to risk

Background and Social History (1 minute)

• Personal history highlights relevant to presentation: childhood adversity, trauma, attachment disruptions
• Developmental history if relevant (e.g., neurodevelopmental presentations)
• Family psychiatric history: "Is there anyone in your family who has experienced mental health difficulties?" — specific diagnoses, treatments, suicide in family
• Substance use screening: alcohol (units per week, CAGE/AUDIT), recreational drugs (type, frequency, route), tobacco
• Social circumstances: accommodation, employment/benefits, relationships, children, daily routine
• Forensic history if relevant: convictions, current legal proceedings, probation
• Support network: who can they turn to? Involvement of community mental health team, GP, crisis team

Closing the Station Effectively (30-60 seconds)

A strong close can elevate an average station to a pass. Follow this structure:

1. Signal the close: "Thank you for sharing all of that with me. Let me just summarise what I've understood..."
2. Brief summary: Hit 3-4 key points — presenting complaint, key symptoms, risk, and one psychosocial factor. Keep it under 30 seconds.
3. Check accuracy: "Have I missed anything important?" / "Is there anything you'd like to add?"
4. Outline next steps: "Based on what you've told me, I think it would be helpful to..." (further assessment, investigations, referral, treatment)
5. Thank the patient: "Thank you for speaking with me today"

Handling Difficult Scenarios

The Over-Talkative Patient - Allow the initial narrative, then gently redirect: "I can see there's a lot going on. Could I ask you about a few specific things?" - Use summarising as a steering tool: "So you've been feeling low and struggling with sleep. I'd like to ask you about..." - Do not be afraid to politely interrupt — examiners expect you to manage time

The Guarded or Hostile Patient - Acknowledge the difficulty: "I can see you're not sure about being here. That's completely understandable" - Explain your role and the purpose clearly - Use normalising language: "Many people I see feel uncomfortable talking about these things at first" - Focus on building rapport before pushing into sensitive areas

The Tearful/Distressed Patient - Allow a pause — hand tissues if available - Use empathic statements: "I can see this is very upsetting for you. Take your time" - Do not rush past the emotion — a moment of genuine empathy scores more than an extra screening question - Gently return to the assessment when the patient is ready

The Patient Who Denies Everything - Use third-person normalising: "Some people in your situation find that they..." - Explore the referral reason: "Your GP was concerned about... Could we talk about that?" - Accept the patient's account while still screening for key symptoms - Document the discrepancy between referral information and patient's report

Collateral History Stations

Some CASC stations require you to take a collateral history from a family member, carer, or professional. These require a different approach:

• Introduce yourself clearly and explain confidentiality boundaries
• Ask what they have observed: changes in behaviour, mood, cognition, daily functioning
• Clarify the timeline of concerns
• Ask about the patient's baseline functioning for comparison
• Explore their concerns about risk: "Are you worried about their safety?"
• Ask about the impact on the informant: carer burden, need for support
• Thank them for their contribution and explain next steps

Common Mistakes to Avoid

1. Jumping to closed questions too early — Let the patient tell their story first; the funnel technique should guide your approach
2. Forgetting risk assessment — This is assessed in virtually every station; even if it feels like a "safe" station, screen for it
3. Running out of time — Practice with a timer to develop your pacing; aim to reach your closing summary by 6 minutes
4. Appearing robotic — Your structure should be invisible to the patient; transitions should feel natural
5. Not summarising — Always close with a brief summary; this is a significant scoring opportunity
6. Following your own agenda over the patient's cues — If the patient mentions something clinically important, follow it up even if it is not next on your mental checklist
7. Forgetting functional impact — Always ask how the symptoms affect daily life, work, and relationships
8. Neglecting substance use — A quick screen for alcohol and drugs should be routine in every history
9. Not adapting to the patient — A hostile patient needs a different approach from a cooperative one; flexibility is assessed

Practice Checklist

• [ ] Can I complete a full psychiatric history in 7 minutes consistently?
• [ ] Do I naturally integrate risk screening without it feeling forced?
• [ ] Am I using the funnel technique (open to focused to closed)?
• [ ] Can I recite core screening questions for depression, psychosis, mania, anxiety, and OCD?
• [ ] Do I explore functional impact for every presenting complaint?
• [ ] Can I handle a talkative patient without losing control of the station?
• [ ] Can I respond empathically to a distressed patient without losing time?
• [ ] Do I summarise and check understanding at the end of every practice station?
• [ ] Have I practiced with realistic simulated patients under timed conditions?
• [ ] Can I take a collateral history with appropriate adjustments?