There are three categories used to identify types of personality disorders. Each group is referred to as a cluster. Disorders are placed into one of three categories based on the unifying characteristics of the disorders. Personality disorders can be classified as Cluster A, B, or C.
Cluster A personality disorders are characterized by abnormal thinking and behaviors. People with these Cluster A disorders are often described as eccentric. Personality disorders in this group include paranoid, schizoid, and schizotypal personality disorders. 1
Cluster B personality disorders are typically characterized by dramatic thought and behavioral patterns. People who struggle with Cluster B disorders can also show unpredictable thinking and behavior. These disorders include antisocial, borderline, histrionic, and narcissistic personality disorders. 3
Anxious thoughts and reactive behaviors characterize Cluster C personality disorders. People struggling with these disorders may come off as fearful or as having constant anxiety. Disorders in Cluster C include avoidant, dependent, and obsessive-compulsive personality disorders. 1
To better understand the characteristics of the specific disorders, it is essential to examine each disorder on its own. It is also important to note that all people are different and may display various signs and symptoms associated with personality disorders.
Here are brief descriptions of each of the ten identified personality disorders: