Discrimination between and among schizophrenics and other pathologies using a Spanish version of the Whitaker Index...

A Spanish version of Forms A and B of the Whitaker Index of Schizophrenic Thinking (WIST) was administered to two sets of subjects. In the first study, the WIST was administered to 147 subjects of both sexes grouped into one of six categories: acute paranoid schizophrenic, acute nonparanoid schizophrenic, chronic paranoid schizophrenic, chronic nonparanoid schizophrenic, normal, and university student. Results revealed significant group differences; schizophrenics scored significantly higher. Further, chronic schizophrenics, regardless of the existence of paranoia, scored higher than acute subjects. In the second study, a heterogenous group of schizophrenics was compared to heroin addicts and depressed subjects (total N = 93). Significant group differences again were noted; the schizophrenics scored higher than the two other clinical samples.