- deteriorating social functioning (e.g. spending increasing amounts of time alone in one's room)
- a family history of psychosis combined with a recent decline in functioning e.g. a drop in school marks or a withdrawal from extracurricular activities)
- an increase in unusual thoughts (e.g. thinking strangers' conversations are about one's self)
- an increase in suspicion/paranoia
- past or current drug abuse
The researchers also found that those who progressed to a psychotic disorder tended to do so relatively quickly. 22% developed psychosis within the first year, 11% by the end of the second year and the remaining 3% by the end of 2 1/2 years.
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