<unk>  (SPD) is a personality disorder characterized by a lack of interest in social relationships, a tendency towards a solitary lifestyle, secretiveness, and emotional coldness. SPD is reasonably rare compared with other personality disorders. Its prevalence is estimated at less than 1% of the general population.
Schizoid personality disorder
Histrionic personality disorder
Emotionally unstable personality disorder
Dissocial personality disorder
Dependent personality disorder
Depressive personality disorder
Borderline personality disorder
Obsessive compulsive personality disorder