Document Type : Research Article

Authors

Abstract

The aim of this research was to study the ability of the continuous performance test (CPT) in the differential diagnosis of patients with psychiatric disorders and normal subjects. The research was causal-comparative. Using the convenient sampling method, 27 schizophrenic, 28 major depressive, 29 obsessive-compulsive patients and 29 normal individuals were selected and then matched based on age, gender, educational background and marital status. The Participants’ cognitive performance was assessed using CPT. Data were analyzed using the MANOVAs and the Scheffe post hoc test. Results suggested that, compared to normal subjects, patients with schizophrenia and obsessive-compulsive disorders had a significantly lower performance in three components of the CPT (i.e., omission error, correct response, reaction time). Likewise, depressive patients manifested significantly poor performance in two components of test (i.e., commission error, reaction time). The CPT was accordingly capable of differentiating patients with schizophrenia, major depression and obsessive-compulsive disorders from normal individuals, but could not differentiate patient groups.

Keywords

فارسی
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