The relationships of some information-processing factors to severely disturbed behavior

Thirty-five psychiatric inpatients with heterogeneous diagnoses were given four tasks: Mueller-Lyer Illusion, Wisconsin Card Sorting Text, Object Sorting, and Rokeach dogmatism questionnaire. Tasks were chosen to represent a broad sampling of paradigms, spanning levels of information processing, involving perceptual, conceptual and attitudinal processes. Subjects' behavior was assessed by the Inpatient Multidimensional Psychiatric Scale (IMPS). Each IMPS scale was analyzed in turn as a function of perceptual/cognitive variables, in multiple regression analysis. To provide basis for comparison, traditional clinical measures were included as independent variables (MMPI scales) and dependent variables (intelligence, chronicity, and premorbid adjustment). Results showed that different patterns of disordered behavior were predicted by different perceptual/cognitive variables. MMPI scores were predicted primarily by traditional measures. Interrelationships of all variables suggested three subject groups: chronic, process-type schizophrenics with perceptual abnormalities, paranoid patients with conceptual abnormalities, and affectively disordered patients with predominantly attitudinal abnormalities.