Abstract
It was hypothesized that within the psychotic category there would be perceptual differences large enough to differentiate and identify subgroups by perceptual testing. The Minnesota Percepto-Diagnostic Test (MPD) was used to divide a male, hospitalized psychotic population into two groups designated as good (N = 39) and poor (N = 39) perceivers. Each individual in one group was matched as closely as possible on age and intelligence with an S in the other group. Comparisons of these two groups on the MPD Test and the MMPI were made to determine what clinical sub-group most frequently comprised the good and poor perceiver groups. (1) The good perceiver group was brighter and younger than the poor perceiver group. (2) The groups were significantly different on the MPD Test. (3) The good perceiver group consisted mainly of paranoid and acute schizophrenics while the poor perceiver group was composed mainly of the chronic, undifferentiated type. (4) The poor perceiver group was significantly different from the good perceiver group on MMPI scales: F, Sc, and Si.
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