The British Journal of Psychiatry (2006) 189: 373-378. doi: 10.1192/bjp.bp.105.021022
© 2006 The Royal College of Psychiatrists
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Influence of social perception and social knowledge on cognitive and social functioning in early psychosis

JEAN ADDINGTON, PhD

Department of Psychiatry, University of Toronto, Centre for Addiction and Mental Health, Toronto and Department of Psychiatry, University of Calgary

HUMA SAEEDI, MSc

Centre for Addiction and Mental Health, Toronto

DONALD ADDINGTON, MBBS

Department of Psychiatry, University of Calgary, Calgary, Canada

Correspondence: Dr Jean Addington, PhD, Centre for Addiction and Mental Health, 250 College Street, Toronto, Ontario, M5T 1R8, Canada. Tel: +1 416 535 8501; fax: +1 416 979 6936; email: jean_addington{at}camh.net

Declaration of interest None. This study was funded through a grant to Jean Addington from the Canadian Institutes of Health Research.

Background Social cognition has been implicated in the relationship between cognition and social functioning.

Aims To test the hypothesis that social cognition mediates the relationship between cognitive and social functioning.

Method This was a 1-year longitudinal cohort study comparing three groups: 50 people with first-episode psychosis, 53 people with multi-episode schizophrenia and 55 people without psychiatric disorder as controls. Participants were assessed on social perception, social knowledge, interpersonal problem-solving, cognition and social functioning.

Results There were significant associations between social cognition, cognition and social functioning in all three groups. Deficits in social cognition were stable over time. In the first two groups, controlling for social cognition reduced the relationship between cognitive and social functioning.

Conclusions This study provides some evidence that social cognition mediates the relationship between cognitive and social functioning.




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