A Factor Analytic Study of the Rorschach Prognostic Index

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Abstract
Piotrowski and Bricklin's stale, based on 12 Rorschach signs, was developed to assess long-term prognosis for hospitalized schizophrenic patients. This investigation of the dimensional structure of the scale in a group of 259 schizophrenics resulted in the description and scoring of 4 factors. They were identified as A—Constriction, B—Doubtful Perception or Interpretation, C—Inappropriately Applied Energy, and D — Sporadic Arbitrariness. The scored factors remained essentially orthogonal. As a measure of construct validity the ability of the factor scores to predict outcome of hospitalization was tested. In a subsample of 68 Ss who were followed for 4 years after hospital admission, the multiple correlations between the 4 factor scores and 2 criteria of outcome were significant. Except for Factor C, all contributed significantly to prediction for at least 1 criterion.

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