Which cluster of personality disorders is defined by odd or eccentric behavior?

The cluster of personality disorders characterized by odd or eccentric behavior is indeed Cluster A. This cluster includes disorders such as paranoid personality disorder, schizoid personality disorder, and schizotypal personality disorder. Individuals diagnosed with these disorders may display peculiar thoughts, behaviors, and social interactions that set them apart from the general population.

For example, those with schizoid personality disorder may demonstrate a lack of interest in social relationships and a preference for solitary activities, while individuals with schizotypal personality disorder may exhibit odd beliefs or magical thinking and often struggle with interpersonal relations due to their eccentric behavior.

Understanding the traits associated with Cluster A is crucial for identifying and differentiating these disorders from those in other clusters, which encompass more dramatic or anxious behaviors.