People with schizotypal personality disorder may be severely disturbed, and their odd behavior may resemble that of people with schizophrenia. They may have unusual preoccupations and fears, such as fears of being monitored by government agencies, which are also common in schizophrenia.

More commonly, however, people with schizotypal personality disorder simply behave oddly and have unusual beliefs (aliens, witchcraft, etc.) that they cling to so strongly that it isolates them from normal relationships. Full-blown hallucinations are unusual.

Some of the common signs of schizotypal personality disorder include the following:

• Discomfort in social situations
• Odd beliefs, fantasies, or preoccupations
• Odd behavior or appearance
• Odd speech
• No close friends
• Inappropriate displays of feelings