Which cluster personality disorder includes the trait of being socially withdrawn?

The correct answer pertains to Cluster A personality disorders, which are characterized by odd or eccentric behaviors, including tendencies toward social withdrawal. Individuals with these disorders often exhibit traits such as paranoia, social detachment, or distorted thinking. Specific examples of Cluster A disorders include paranoid personality disorder, schizoid personality disorder, and schizotypal personality disorder.

Social withdrawal, particularly as seen in schizoid personality disorder, is characterized by a lack of interest in social relationships, a preference for solitary activities, and a limited range of emotional expression. This feature is central to the understanding of Cluster A, establishing how these disorders manifest in behaviors that distance individuals from social interaction.

In contrast, Cluster B personality disorders include dramatic, emotional, or erratic behaviors, which do not primarily focus on social withdrawal. Cluster C personality disorders, associated with anxious and fearful behavior, may involve some level of social avoidance; however, the key characteristic of being socially withdrawn aligns more closely with the traits of Cluster A.