A COMPARISON OF THE MMPI-2 AND RORSCHACH INKBLOT TECHNIQUE IN ASSESSING SCHIZOPHRENIA

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1995

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Abstract

The study examined the concordance of Rorschach and MMPI-2 variables relating to schizophrenia. 85 psychiatric inpatients were administered both the MMPI-2 and Rorschach. A profile analysis compared individuals who elevated on the Rorschach SCZI index to nonelevators. No significant profile differences were found using a SCZI index cutoff of 4. When more distinct SCZI index groups were created ( ≥ 5 vs. ≤ 2) the profiles were found to be significantly different (average MMPI-2 profile for elevated SCZI group = 8-6-7) and the elevated SCZI group evidenced higher MMPI scale scores overall. The 8-6-7 profile has been associated with schizophrenia in previous research. The sensitivity, specificity, and hit rate of both instruments in predicting clinical diagnoses were also calculated. The MMPI-2 demonstrated better sensitivity while the SCZI index yielded higher specificity; the combination of instruments produced the best hit rate. The study demonstrated a relationship between MMPI-2 and Rorschach variables related to psychosis.

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