Neuropsychological differences among subtypes of schizophrenia.

Administered the WAIS, the Halstead-Reitan Neuropsychological Test Battery, associated test procedures, and complete neurological evaluations to 140 schizophrenic inpatients. These Ss were subdivided according to 3 criteria: paranoid vs nonparanoid, neurologically normal vs abnormal, and long-term vs short-term institutionalization. Comparisons between groups were made using 3 stepwise discriminant analyses. Although all of these analyses yielded percentages of correct classification that exceeded chance, the greatest accuracy by far was obtained for the long-term vs short-term institutionalization subdivision. Individual tests contributing the most discriminatory power varied from comparison to comparison, with a complex problem-solving test being the best discriminator in the long-term vs short-term comparison and a simple motor test the best discriminator in the other comparisons. (20 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)