Antisocial personality disorder

Antisocial personality disorder (ASPD) is characterized by a pervasive pattern of disregard for and violation of the rights of others, beginning in childhood or early adolescence and continuing into adulthood. The DSM-5 requires evidence of conduct disorder before age 15 and at least 3 of 7 adult criteria: failure to conform to social norms, deceitfulness, impulsivity, irritability/aggressiveness, reckless disregard for safety, consistent irresponsibility, and lack of remorse.

It is important to distinguish between ASPD and psychopathy, though they are often conflated. ASPD is a DSM diagnostic category based on observable behaviors, with a prevalence of 3–5% in men and 1% in women. Psychopathy, measured by Hare's Psychopathy Checklist-Revised (PCL-R), is a more restrictive construct adding interpersonal (superficial charm, manipulation) and affective (lack of empathy, shallow emotions) traits to behavioral criteria.

Etiology involves genetic factors (heritability of 50–80%, the highest among PDs), neurobiological (amygdala and prefrontal cortex dysfunction, reduced autonomic reactivity to threat), and environmental (child abuse, neglect, inconsistent parenting, violence exposure). Gene-environment interaction is particularly marked: the MAOA-L gene ('warrior gene') increases antisocial behavior risk, but mainly in the presence of childhood maltreatment.

Treatment is one of the greatest challenges in clinical psychology. Traditional approaches have shown limited efficacy. Structured therapeutic communities, cognitive violence-reduction programs, and early interventions with children showing callous-unemotional traits show promising results. Early prevention (parenting programs, intervention in childhood conduct disorder) is probably the most effective pathway.

Forensic implications are significant. ASPD is highly prevalent in prison populations (47–75% of male inmates). The debate about criminal responsibility in the presence of psychopathy — whether incapacity for empathy mitigates moral culpability — remains a central topic in neuroethics and forensic psychology.

Recent research focuses on subtypes. The distinction between 'primary' (low anxiety, planned) and 'secondary' (high anxiety, reactive) psychopathy has implications for treatment. Individuals with secondary psychopathy may respond better to intervention.