The Last-Weiss Rorschach Ego-Strength Scale as a prognostic measure for psychiatric inpatients.

This study tested the hypothesis that the Last-Weiss (Last & Weiss, 1976) Rorschach Ego-Strength Scale would predict outcome among a representative sample of first-lifetime psychiatric admissions. One hundred seventeen patients were assessed with structured symptom, psychiatric history, and social data interviews at hospital admission, and 2-year follow-up. Outcome measures included a multidimensional variable involving rehospitalization time, social and work functioning, and recent symptom level and symptom measures. Unexpectedly, the Last-Weiss Sum E variable correlated significantly with negative multidimensional outcome, a result that was strengthened when any possibly confounding effects of social class, IQ, and number of Rorschach responses were partialled out. It was found that Sum E's predictive value for poorer outcome was due to the space response (S+) component of the ego-strength variable. Possible explanations of the findings and implications for the previously validated Klopfer's Rorschach Prognostic Rating Scale are discussed.