3 groups of judges, varying in amounts of clinical experience, predicted Wechsler-Belleveue IQ scores from Rorschach psychograms in competition with a multiple regression equation. The results indicated that: (a) There was no significant difference between the degree of accuracy of the judgments of the equation and of the clinicians, (b) The judges and the multiple regression equation were able to judge IQ scores significantly better than chance, (c) Clinical predictive accuracy, as indicated by high positive correlations between predicted and actual IQ scores and low average error scores, did not increase significantly with amount of clinical experience.
The Beck Depression Inventory (BDI) is one of the most widely used measures of depression. Many studies have examined the reliability and validity of the BDI. However, we found no published studies that considered the stability of the BDI over multiple administrations (i.e., more than 3 trials), such as is common in clinical trials research and during some clinical interventions. The purpose of this study is to examine the multiple test-retest reliability of the BDI in a presumably nonclinical sample. Results show a 40% decline in BDI scores over 8 weeks, a main effect that accounts for approximately 10% of the variance. We achieved a 40% decrease in self-reported symptoms of depression due to repeated measurement alone, not due to any intervention. This change likely represents measurement error with this instrument rather than any "real" change in depression. The limitations of this study, its implications for research, and its applications to clinical practice are discussed.
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