1Cademy - Schizoid Personality Disorder

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Schizoid Personality Disorder

A disorder marked by consistent avoidance of social interaction, a disinterest in others, and flat emotional affect. Very uncommon, it only affects less than 1% of the population. Though symptoms are similar to schizotypal personality disorder and schizophrenia, those with schizoid personality disorder have not lost touch with reality (no hallucinations or delusions), and their speech is coherent and rational. Also, these individuals are not anxious about their lack of social contact, unlike in schizotypal personality disorder.

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Updated 2025-10-09

Contributors are:

Andie Meddaugh

Gemini AI

Who are from:

University of Rochester

University of Rochester

Google

References

Tags

Behavioral Neuroscience

Psychology

Neuroscience (Neurobiology)

Social Science

Empirical Science

Science

Life Science / Biology

Biomedical Sciences

Introduction to Psychology @ OpenStax Course

Natural Science

OpenStax Psychology (2nd ed.) Textbook

OpenStax

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A 45-year-old librarian has worked at the same library for 20 years. He has never married, has no close friends, and consistently declines invitations to social events from his colleagues. He describes his hobbies as reading and cataloging his stamp collection, both of which he does alone. When interacting with library patrons, he is polite but brief, showing very little emotional expression. He reports feeling content with his solitary lifestyle and has no history of unusual perceptual experiences or paranoid thoughts. Based on this presentation, which of the following is the most likely diagnosis?