Development of the Social Perception Scale for Cognitive Rehabilitation in Patients with Schizophrenia

An, Suk Kyoon; Sohn, Seok Han; Lee, Man Hong; Lee, Hee Sang; An, Hye Ry

Abstract

OBJECTIVES
This research was performed in order to develop the social perception scale which could detect the deficits of the social perception, composed of visual perception and contextual perception, in the patients with schizophrenia and might have the desirable reliability and discriminating power between the patients with schizophrenia and the normal controls, and so as to be appropriate to the schizophrenics' cognitive rehabilitation strategy of Brenner, et al.
METHODS
We selected 10 photographs among 30 photographs which could show the variable social situations according to the consensus of the staff members of the Integrated Psychological Therapy. Then we developed the questions, composed of visual perception subscale and contextual perception subscale, which we called preliminary social perception scale. We tested the above scale to the 20 patients with schizophrenia in the chronic mental hospital. Then we tested the above scale to both the 20 patients meeting DSM-IV criteria for schizophrenia in the closed ward of the university psychiatric hospital and the 20 normal controls. We developed the final social perception scale to exclude the items of inadequate reliability. We compared the item difficulties of social perception scale between the patients in the chronic mental hospital and those in the university psychiatric hospital. finally, we compared the scores of social perception scale between the patients with schizophrenia and the normal controls.
RESULTS
The final 6 items were selected to become the social perception scale according to the values of the item-total correlation, test-retest reliability, and interrater reliability. The final social perception scale showed similar rank of item difficulties between two groups with schizophrenia. The patient group differed significantly fiom the normal control group on the scores of contextual perception subscale(t=-3.09, p<.01) and the total scores of social perception scale(t= -3.33, p<.01).
CONCLUSION
This study suggests that the above social perception scale which has excellent internal consistency, test-retest reliability, interrater reliability and the discriminating power. This scale can be applied to both the cognitive rehabilitation strategy in the patients with schizophrenia and the evaluation of the effectiveness of the cognitive rehabilitation.