Chart — Mental Health
Personality Disorder Clusters Comparison
The ten personality disorders sort into three clusters — remember them as the “weird, wild, and worried” groups (A, B, C). Here is each cluster with its disorders and nursing focus.
Educational use only. Diagnosis is provider-directed. This chart is an educational comparison aid. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
The Three Clusters
| Cluster | Theme | Disorders | Nursing focus |
|---|---|---|---|
| Cluster A — Odd / Eccentric ('weird') | Social detachment and distrust | Paranoid (pervasive distrust/suspicion), Schizoid (detached loner, little interest in relationships), Schizotypal (magical thinking, odd beliefs/speech, social anxiety) | Non-intrusive, honest, consistent approach; respect need for distance; clear, simple communication |
| Cluster B — Dramatic / Erratic ('wild') | Emotional, dramatic, impulsive | Antisocial (disregard for others' rights, no remorse), Borderline (instability, splitting, self-harm), Histrionic (attention-seeking, dramatic), Narcissistic (grandiosity, need for admiration) | Clear consistent limits; unified team to counter splitting/manipulation; safety for self-harm; don't react with anger |
| Cluster C — Anxious / Fearful ('worried') | Anxiety and fearfulness | Avoidant (fear of rejection, socially inhibited), Dependent (clinging, can't decide alone), Obsessive-compulsive personality (rigid perfectionism/control — NOT OCD) | Build confidence and autonomy; reduce anxiety; encourage decision-making; patience with indecision/perfectionism |
Exam Traps
- ✦A / B / C = 'weird (odd), wild (dramatic), worried (anxious).'
- ✦Cluster A = paranoid, schizoid, schizotypal; Cluster B = antisocial, borderline, histrionic, narcissistic; Cluster C = avoidant, dependent, OCPD.
- ✦Borderline (Cluster B) is the most tested — splitting, self-harm, fear of abandonment; care = consistent limits + unified team.
- ✦Obsessive-compulsive PERSONALITY disorder (Cluster C, rigid perfectionism) is NOT OCD (obsessions/compulsions).
- ✦Antisocial = no remorse and exploitation; narcissistic = grandiosity over fragile self-esteem.
- ✦Personality disorders are ego-syntonic — patients usually see no problem, so insight and motivation are low.
Related Resources
Standards & sources
Fact-checked Jun 21, 2026This page is written to align with American Psychiatric Association (DSM-5-TR) · American Psychiatric Nurses Association (APNA) · SAMHSA. It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →