Dissocial vs Borderline Personality Disorder
Dissocial Personality Disorder Borderline Personality Disorder
Overview
Both disorders can present with impulsivity, difficult relationships, and a history of conflict with others, which leads students to lump them together as simply 'difficult' personalities. The underlying organisation is different: dissocial personality disorder is built around a callous disregard for others and the rules that govern them, while borderline personality disorder is built around an unstable sense of self and a desperate, often frightened, relationship to other people.
| Dimension | dissocial-personality-disorder | borderline-personality-disorder |
|---|---|---|
| Core organising feature | Callous unconcern for the feelings of others and a persistent disregard for social norms and obligations | A pervasive pattern of instability in relationships, self-image, and mood, alongside marked impulsivity |
| Relationship to others | Relationships are frequently instrumental or exploitative; low capacity for guilt or remorse when others are harmed | Relationships are intense and unstable, alternating between idealisation and devaluation, often with a desperate effort to avoid real or imagined abandonment |
| Self-image | Generally stable, though may include an inflated sense of entitlement or superiority | Markedly unstable and poorly formed, with the person often reporting a chronic sense of emptiness or uncertainty about who they are |
| Emotional pattern | Low frustration tolerance and a low threshold for aggression, but not typically characterised by rapid, marked mood swings | Marked reactivity of mood, with intense episodes of dysphoria, anxiety, or irritability usually lasting hours rather than days |
| Attitude to rules and consequences | Persistent disregard for social norms, obligations, and the law, with little capacity to learn from punishment or negative consequences | Impulsive behaviour (spending, substance use, self-harm) arises more from emotional dysregulation in the moment than from a settled disregard for norms |
| Typical example | A person with a long history of theft, deception, and violence, who shows no evident guilt or concern after harming someone close to them | A person whose view of a close friend swings from adoration to furious rejection within the same day, alongside recurrent self-harm at times of perceived rejection |
Common confusion
Because both disorders can include impulsivity, self-destructive or risky behaviour, and a stormy interpersonal history, students often reach for 'antisocial traits' whenever they see conflict with others. The discriminating question is not how much trouble the behaviour causes, but what is driving it — cold disregard and exploitation, or frightened, unstable attachment and a fragile sense of self. The two can also co-occur, which does not collapse the distinction; it simply means both patterns need to be assessed independently.
Clarifying questions
- When you think about someone you've hurt, do you feel much about it, or does it not really trouble you?
- Does your view of the people close to you tend to swing between thinking they're wonderful and feeling furious with or rejected by them?
- Do you have a settled, stable sense of who you are, or does it feel like it shifts a lot depending on who you're with or how you're feeling?
Provenance
Class B · tier T1 · lifecycle migrated_candidate
- Casey, P. & Kelly, B. (2019). Fish's Clinical Psychopathology, 4th ed. Ch. 10, 'Personality Disorders'.