Does the MMPI-168 exaggerate psychotic pathology?
Three scoring versions of the MMPI, scored on the same protocol, were compared in a multivariate design with 198 psychiatric patients. The MMPI-168 schizophrenia scale had a statistically higher elevation than the Dutch and American scoring versions. This makes MMPI-168 profiles more often "schizophrenic" than other scoring versions. The MMPI-168 systematically overscores the presence of "psychotic" code types, 45% of all protocols. Implications of the findings are discussed.
Dingemans
P M
PM
University of Amsterdam, Department of Psychodiagnostics, The Netherlands.
Wekking
E M
EM
D003431:Cross-Cultural Comparison; D006801:Humans; D008950:MMPI / Q000706:statistics & numerical data*; D009426:Netherlands; D010343:Patient Admission; D010554:Personality Disorders / Q000145:classification / Q000175:diagnosis / Q000523:psychology; D011594:Psychometrics; D011618:Psychotic Disorders / Q000145:classification / Q000175:diagnosis* / Q000523:psychology; D015203:Reproducibility of Results; D012559:Schizophrenia / Q000145:classification / Q000175:diagnosis; D012565:Schizophrenic Psychology; D014481:United States