Clinical interviews systematically gather information about symptom onset, severity, and functional impact while building therapeutic rapport. Effective assessment balances open-ended exploration with structured inquiry to inform diagnosis and treatment planning.
From your study of DSM-5 diagnostic criteria, you have a map of the symptom clusters and thresholds that define each disorder. The clinical interview is the primary instrument for determining whether a given person meets those criteria — but the interview is far more than a checklist. It must simultaneously gather diagnostic information, assess severity and context, understand the person's life history and functional impairment, and begin establishing the relational foundation that makes treatment possible. Learning to do all of this at once is the central practical skill of clinical assessment.
Interviews exist on a continuum from unstructured to fully structured. An unstructured interview follows the clinician's judgment about what to explore, adapting to what the client brings. Structured interviews like the SCID (Structured Clinical Interview for DSM Disorders) follow a fixed decision-tree script that systematically queries each diagnostic criterion, producing highly reliable diagnoses — different clinicians will reach the same conclusion — but at the cost of flexibility. Most clinical practice uses semi-structured approaches: a defined set of domains to cover, with freedom in how questions are phrased and followed up. This preserves reliability while allowing the clinician to respond to the person's account rather than running through a script.
The diagnostic interview covers several domains regardless of presenting complaint: chief complaint (why the person is seeking help now), history of present illness (onset, precipitants, symptom evolution, current severity), psychiatric history (prior episodes, diagnoses, treatments and their outcomes), medical history (conditions that could cause or complicate psychiatric symptoms), family history (genetic loading for relevant disorders), psychosocial history (development, relationships, occupational functioning), and mental status examination (observable features: appearance, mood, thought process, cognition). These domains aren't arbitrary — each one closes a different diagnostic possibility or shapes treatment planning in a specific way. Knowing that a patient's depressive symptoms began after starting a corticosteroid changes the diagnosis entirely.
A critical skill the DSM-5 doesn't directly teach is the balance between open-ended and closed-ended questions. Open-ended questions ("Tell me what's been going on for you") gather rich qualitative information and build rapport — the person feels heard rather than interrogated. Closed-ended questions ("Have you had thoughts of suicide in the past week?") clarify specific criteria efficiently and ensure nothing is missed. Effective interviewers start broad and funnel down, using the client's narrative to guide which diagnostic domains require closer examination. They also attend to what is not said: a patient who describes depressed mood but never mentions anhedonia may simply not use that language — a skilled interviewer probes, rather than concluding it's absent. The goal of the interview is not just to fill in diagnostic boxes but to develop a coherent clinical picture of this specific person's presentation.