Personality disorders involve persistent patterns of thoughts and behaviors which are maladaptive and differ from the expectations of one's culture. The DSM-5 identifies 10 personality disorders, split up into 3 categories: Cluster A, Cluster B, and Cluster C. Cluster A personality disorders are characterized by odd, disorganized, and/or eccentric thinking and behaviors. Cluster B personality disorders are characterized by dramatic emotions and impulsive, unpredictable behaviors. On this LibGuide, resources for psychopathy can also be found in this section (psychopathy is not itself an official personality disorder, but it is often related to antisocial personality disorder). Cluster C personality disorders are characterized by anxious/fearful thinking and behaviors. Click on the links for resources on each.