DETECTION OF THE SCHIZOID TAXON WITH MMPI INDICATORS

Three different taxometric methods were used, each with a different set of MMPI schizoid indicators, in attempts to detect the schizoid taxon in a hospitalized psychiatric sample of 211 males. None of the patients had been formally diagnosed schizophrenic. In each of the analyses, a latent homogeneous class, or taxon, was detected. The 3 analyses were consistent in that the schizoid taxon base-rate estimates were very close (.37, .40, and .41), and the average agreement rate between methods in the classification of individuals as members of the taxon or not was as high as indicator validities would permit. The mean MMPI profile of taxon members, a 2-7-8 code type, which is usually diagnosed as schizophrenia or schizoid personality, was highly similar to the average profile of a preschizophrenic sample. (14 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1979 American Psychological Association.