How do early stages of information processing influence social skills in patients with schizophrenia?

Persons with schizophrenia show deficits across a broad range of cognitive domains, and their social skill deficits are thought, to some extent, to be caused by cognitive dysfunction. In this study, we attempted to replicate the correlation between the early stages of information processing and non-verbal skills. Subjects for the study included 22 men and six women who met DSM-IV criteria for the diagnosis of schizophrenia. All subjects were attending a rehabilitation program at the day-treatment centers of their hospitals. Social skills were assessed using a structured role-play test. The Degraded-Continuous Performance Test (CPT) and Span of Apprehension Test (SPAN) were used. Non-verbal skills were significantly correlated with CPT-False Alarm Rate (the rate of commission errors of all trials) in multiple regression analysis, but the receiving-processing skills did not have any relation to CPT or SPAN score. Non-verbal skills may be related to early information-processing deficiency, especially the response-inhibiting system. Receiving and processing skills may be related to later stages of information processing, or may reflect not only 'molecular' stages of information processing (less complex and less integration task in a continuum of complexity of cognitive processes) but also other factors such as social learning.