As Paris concisely tells us, in the current DSM-IV-TR the personality disorders (axis II) are classified as belonging to one of three clusters. These clusters had been previously described as odd (cluster A), dramatic (cluster B), and anxious (cluster C). The disorders in cluster A, such as schizoid personality, are characterized by high levels of introversion and/or unusual cognitions. Cluster B disorders, such as antisocial personality disorder or borderline personality disorder, are associated with high levels of impulsivity and affective instability, and cluster C disorders, such as avoidant personality disorder, are associated with social anxiety or an unusual need for control. Paris stresses that trait profiles are likely to be identified in childhood and that they correspond to the broad dimensions of psychopathology (externalizing traits are related to cluster B, internalizing traits to cluster C, and cognitive traits to cluster A).