Which of the following behaviors is characteristic of Cluster A personality disorders?

Cluster A personality disorders are characterized by eccentric or odd behaviors that significantly deviate from societal norms. This cluster includes disorders such as paranoid personality disorder, schizoid personality disorder, and schizotypal personality disorder. Individuals with these disorders often display behaviors and thought patterns that may seem strange or unusual, leading to social isolation and difficulty forming close relationships.

Eccentricity can manifest in various ways, such as having unconventional beliefs, distorted thinking, or engaging in odd behavior that might draw attention. Their communication styles may also be peculiar, which contributes to interpersonal difficulties.

The other choices refer to behaviors associated with different clusters of personality disorders. Impulsive and erratic behavior is more commonly associated with Cluster B personality disorders, which include borderline and antisocial personality disorders. Excessive emotionality is characteristic of Cluster B as well, particularly in histrionic personality disorder. Interpersonal avoidance relates to Cluster C personality disorders, such as avoidant personality disorder, where individuals exhibit shyness, fear of criticism, and avoid social situations. Therefore, eccentric or odd behavior is the defining feature of Cluster A personality disorders, making it the correct choice.