The DSM criteria for Schizoid personality disorder are:

• A pervasive pattern of detachment from social relationships and a restricted range of expression of emotions in interpersonal settings, beginning in early adulthood and present in a variety of contexts
  • Neither desires nor enjoys close relationships, including being part of a family
  • Almost always chooses solitary activities
  • Has little, if any, interest in having sexual experiences with another person
  • Takes pleasure in few, if any, activities
  • Lacks close friends or confidants other than first-degree relatives
  • Appears indifferent to the praise or criticism of others
  • Shows emotional coldness, detachment, or flattened affectivity
• Does not occur exclusively during the course of another disorder or medical condition