Which personality disorder cluster includes Antisocial, Borderline, Histrionic, and Narcissistic disorders?

The correct answer is that Antisocial, Borderline, Histrionic, and Narcissistic personality disorders are categorized under Cluster B. This cluster is characterized by dramatic, emotional, or erratic behaviors.

Antisocial personality disorder involves a disregard for the rights of others and often includes deceitful, manipulative, or aggressive behavior. Borderline personality disorder is marked by instability in relationships, self-image, and emotions, often accompanied by impulsive actions and strong emotional reactions. Histrionic personality disorder is characterized by excessive emotionality and attention-seeking behaviors, whereas Narcissistic personality disorder involves a pervasive pattern of grandiosity, a need for admiration, and a lack of empathy.

These disorders demonstrate high levels of emotionality and difficulties in interpersonal relationships, which are defining features of Cluster B. In contrast, Cluster A includes paranoid, schizoid, and schizotypal personality disorders, which are characterized by odd or eccentric behaviors. Cluster C encompasses avoidant, dependent, and obsessive-compulsive personality disorders, which are generally marked by anxious and fearful behaviors. Thus, the traits that define Cluster B clearly align with the mentioned disorders.