Personality theory for psychiatrists — structured clinical viva

Opening definitions

Personality: enduring patterns of thought, affect, impulse, and relating. Traits: dimensional individual differences; FFM domains OCEAN are the workhorse descriptive system with cross-method support.[1] Temperament vs character: Cloninger’s temperament (novelty seeking, harm avoidance, reward dependence, persistence) and character (self-directedness, cooperativeness, self-transcendence) remain viva currency.[5]

Case 1 — high neuroticism and depression

High neuroticism is a meta-analytic vulnerability dimension for anxiety and depressive disorders; treat the episode fully, then plan relapse prevention that includes emotion regulation and trait-informed CBT adaptations. Traits are probabilistic diatheses, not destiny.[8]

Case 2 — identity diffusion and team splits

Map AMPD A (functioning: identity, self-direction, empathy, intimacy) and B (traits: negative affectivity, antagonism, disinhibition via PID-5 domains).[10][15] Psychodynamic add-on: borderline organisation — identity diffusion, primitive defences, intact reality testing. ICD-11: severity of PD first, then trait (and borderline pattern) qualifiers rather than three stacked categories.[13][14] Management: risk, structured therapies (DBT/MBT/schema/TFP/GPM class), consistent team to avoid system splits.

Case 3 — late disinhibition

Late-onset change is organic/substance until proven otherwise — not “new antisocial PD at 61.” Contrast with gradual mean-level adult trait change in meta-analysis, which does not look like rapid frontal syndromes.[13][16]

Spectra language

Internalising–externalising structure of common mental disorders and HiTOP hierarchical models explain comorbidity better than pure categorical silos; personality pathology sits within quantitative spectra.[11]

Assessment 60-second version

Longitudinal history + collateral → LPFS/functioning → trait profile (FFM/PID-5 domains) → categorical tools if coding requires → risk/trauma/neurodevelopment/medical screen.[10][15]

Examiner traps

Personality immutable forever; PD equals eccentricity; five comorbid PDs without severity; PD as reason to refuse care; state depression labelled as lifelong personality without reassessment.[13][16]