The reasoning
"Abnormal" in psychiatry is not statistical rarity and not deviation from your norms. The operative construct (ICD‑11 / DSM‑5‑TR converge here) is a clinically significant disturbance in cognition, emotion regulation, or behaviour, associated with distress or functional impairment, that is not merely an expectable response to a stressor and not solely a culturally sanctioned practice.
A practical bedside filter — D‑I‑R‑E‑C‑T:
- Distress — magnitude of suffering (necessary but not sufficient).
- Impairment — objective decrement in personal/social/occupational functioning.
- Risk — to self, others, or through vulnerability/self‑neglect.
- Excess — intensity/duration disproportionate to context, or failure to remit.
- Context — developmental stage, culture, and precipitants.
- Time — onset, course, persistence, recurrence.
No single axis is diagnostic; you're weighing a convergent pattern.
Discriminators that catch people out
- Distress ≠ disorder. Acute grief, adjustment to job loss, or a divorce can produce intense distress without a disorder. Ask what the distress is doing to function and whether its form/duration exceeds an expectable reaction.
- Culture as a diagnostic variable, not noise. Mourning rituals, trance/possession states, and normative religious experience are only pathologised when they are outside the person's reference group and independently distressing/impairing. Use the DSM‑5 Cultural Formulation Interview logic.
- Bereavement vs major depression. Look for features that aren't typical of ordinary grief: pervasive (not wave‑like) anhedonia, worthlessness/guilt unrelated to the deceased, psychomotor retardation, and active suicidality beyond "wishing to join" the lost person.
The model to hold
Reality is dimensional, decisions are categorical. Symptoms sit on continua (normal variation → subthreshold → disorder); treatment thresholds are pragmatic cut‑points on those continua. Don't reify the category — but do act on it.
Pitfalls
- Medicalising expectable reactions (over‑diagnosis) or dismissing a genuine disorder as "understandable given the circumstances" (under‑diagnosis). Circumstances explain; they don't exclude.
- Using a single florid observation (one odd belief, one tearful moment) as sufficient evidence.
Pearls
- 🎯 Impairment is the workhorse. When distress and context are ambiguous, objective functional decline usually tips the decision.
- 🩺 Ask collateral: functional change is often visible to family before it's admitted by the patient.
Next → To assemble that pattern reliably, standardise your data: symptom vs sign vs phenomenon vs syndrome (Concept 3).