CAQ-Psychiatry common mistakes
CAQ-Psychiatry · Understand the traps and how to avoid them.
Choosing a plausible-sounding answer based on general psychiatric intuition before checking whether it matches the specific diagnostic criteria or timeline given in the stem (e.g., labeling a first episode as schizophrenia without confirming the 6-month duration and functional-decline requirements).
Candidates trained on broad clinical exposure answer from pattern recognition rather than applying the explicit DSM/ICD criteria the item is testing; stems are deliberately written so the intuitive answer is the near-miss diagnosis.
What to do instead
Before selecting, write down the 2–3 criteria the stem actually supplies (duration, functional change, exclusion of substance/medical cause) and eliminate any option that requires a criterion the stem omits. Practice by converting each wrong option into the criterion it violates.
Stopping at the first diagnosis that fits and ignoring a comorbid or more explanatory condition the vignette also supports (e.g., missing that the 'depression' is secondary to hypothyroidism, sleep apnea, or a substance).
Items often embed a second condition or a medical mimic in a single sentence; candidates anchor on the most salient symptom cluster and skim the remainder of the stem.
What to do instead
Read the stem twice: once for the presenting complaint, once specifically hunting for medical history, substance use, medication changes, and onset timing. Build a mental 'rule-out checklist' (medical, substance, medication-induced) and apply it to every vignette before committing.
Selecting the most aggressive or fastest-acting treatment (e.g., ECT, clozapine, involuntary admission) for a scenario where the stem describes an uncomplicated first-line presentation, or conversely choosing watchful waiting when red flags are present.
Exam items reward matching treatment intensity to severity and prior treatment history; candidates over-weight dramatic interventions or under-weight risk indicators because they do not explicitly grade severity first.
What to do instead
Explicitly classify the stem on two axes before answering: severity/risk level and prior treatment trials. First-line, low-risk presentations get guideline first-line agents; reserve clozapine for treatment resistance, ECT for defined indications, and emergency measures for imminent risk.
Confusing the management of a medication side effect with the management of the underlying disorder - for example, switching antipsychotics for akathisia instead of reducing dose or adding a beta-blocker, or mislabeling NMS versus serotonin syndrome versus catatonia.
These distinctions are taught briefly in training and blur under time pressure; the answer choices are constructed so each option treats the wrong problem.
What to do instead
Memorize a compact side-effect algorithm: acute dystonia (anticholinergic), akathisia (dose reduction/beta-blocker), parkinsonism (dose reduction/anticholinergic), tardive dyskinesia (stop/reduce offending agent, consider VMAT2 inhibitor), NMS (stop agent, dantrolene/bromocriptine, supportive care). Drill the autonomic and onset differences between NMS and serotonin syndrome.
Misapplying capacity and consent rules - treating a patient's refusal of care as automatically evidence of incapacity, or assuming a voluntary patient can be detained without meeting statutory criteria.
Capacity is decision-specific and functional; candidates conflate 'bad decision' with 'no capacity' and import clinical judgment where the item tests a legal standard.
What to do instead
Use the four-element capacity framework (understanding, appreciation, reasoning, expressing a choice) and apply it to the specific decision in the stem. Separate capacity assessment from involuntary-commitment criteria (danger to self/others, grave disability) and answer whichever the question actually asks.
Answering epidemiology, prognosis, or risk questions from vague recollection (e.g., 'most patients recover fully') rather than from known base rates, and failing to recognize when a stem is testing a specific numeric or prognostic fact.
These facts are low-frequency in clinical practice and are often learned once and not reinforced; distractor options are designed to sound reassuring or alarming in equal measure.
What to do instead
Maintain a one-page high-yield fact sheet (suicide risk after attempts, relapse rates off antipsychotics, postpartum psychosis timing, completed-suicide risk factors) and review it in the final week. When a stem asks 'most likely,' translate it to 'highest base rate' and choose accordingly.
Missing the developmental or lifespan framing - applying adult criteria directly to a child, adolescent, or older adult vignette (e.g., diagnosing major depression in a child without considering irritability-predominant presentation, or attributing cognitive change in an older adult to 'normal aging').
Training emphasizes adult psychopathology; item writers exploit the fact that symptom expression and diagnostic thresholds shift across the lifespan.
What to do instead
For any vignette under 18 or over 65, pause and ask how the presentation differs at that age before reading options. Review age-specific presentations (irritability in pediatric depression, somatic complaints, delirium versus dementia in older adults) as a dedicated study block.
Overlooking the psychotherapy-modality match - choosing CBT for a condition where another modality is clearly indicated (e.g., exposure-based treatment for OCD, dialectical behavior therapy for borderline personality disorder, family-focused therapy for early psychosis) or choosing therapy when the stem signals need for combined pharmacotherapy.
Candidates reduce psychotherapy questions to 'therapy is good' and do not discriminate among modalities, while items pair each vignette with one best-matched modality.
What to do instead
Build a disorder-to-modality table (OCD: ERP; panic: CBT with interoceptive exposure; BPD: DBT; bulimia: CBT-E; psychosis: family psychoeducation plus medication) and rehearse it until the pairing is automatic.
Mismanaging time and item order - spending excessive time on long vignettes, changing correct answers on review, or leaving items blank when the exam does not penalize guessing.
Vignette-heavy psychiatry items are long; anxiety and perfectionism drive re-reading and second-guessing, and candidates carry over habits from exams with different scoring rules.
What to do instead
Set a per-item time budget, flag and move on from any item exceeding it, and answer every item. On review, change an answer only when you can name the specific fact you misread - not because the option 'feels' wrong.
Failing to integrate the medical workup into psychiatric decision-making - ordering an MRI or EEG indiscriminately, or omitting basic labs (TSH, B12, urine toxicology, glucose) when the stem describes a first episode or atypical presentation.
Candidates either over-order to feel thorough or under-order because they treat the vignette as purely psychiatric; items test the appropriate, not maximal, workup.
What to do instead
Learn the targeted workup for first-episode psychosis, new cognitive decline, and atypical depression, and match testing to the specific red flags in the stem rather than ordering a fixed panel for every patient.