We describe the impact of a psychosocial intervention, critical time interv
ention (CTI), on the cardinal symptom dimensions of schizophrenia, namely n
egative, positive, and general psychopathology. Ninety-six men with schizop
hrenia and other psychotic disorders who were discharged from a homeless sh
elter were randomly assigned to receive either CTI or usual services only.
CTI is a time-limited intervention designed to enhance continuity of care d
uring the transition from institution to community. Symptom severity at bas
eline and at 6 months was assessed using the Positive and Negative Syndrome
Scale. Using data on 76 subjects for whom we have complete symptom data, w
e assessed the impact of CTI on change in symptoms. The results suggest tha
t CTI was associated with a statistically significant decrease in negative
symptoms at the 6-month follow-up, reflecting modest clinical improvement.
There was no significant effect on positive or general psychopathology symp
toms.