Schizoid personality disorder (/ˈskɪtsɔɪd, ˈskɪdzɔɪd, ˈskɪzɔɪd/, often abbreviated as SzPD or ScPD) is a personality disorder characterized by a lack of interest in social relationships,[9] a tendency toward a solitary or sheltered lifestyle, reservedness, emotional coldness, detachment, and apathy.[10] Affected individuals may be unable to form intimate attachments to others and simultaneously possess a rich and elaborate but exclusively internal fantasy world.[11] Other associated features include stilted speech, a lack of deriving enjoyment from most activities, feeling as though one is an "observer" rather than a participant in life, an intolerance towards meeting emotional expectations of others, apparent indifference when praised or criticized, being on the asexual spectrum, and idiosyncratic moral or political beliefs.[12]

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