Acevedo Noriega N, Gonzales M A, Puente A E, Whitaker L C
J Clin Psychol. 1985 Mar;41(2):157-61. doi: 10.1002/1097-4679(198503)41:2<157::aid-jclp2270410205>3.0.co;2-m.
The Spanish translation of Form A of the Whitaker Index of Schizophrenic Thinking (WIST) was administered to 50 schizophrenic (25 acute; 25 chronic) and 50 (25 = depressives; 25 = normals) nonschizophrenic residents of the Commonwealth of Puerto Rico. Results suggest that this translation effectively discriminated between schizophrenics and non-schizophrenics on the WIST total score, time, and index. A cut-off of 25 on the WIST index correctly classified 98% of the schizophrenic volunteers.