50 psychotic depressives, matched to a group of 50 normals for age, sex, race, education, religion, and nativity, are compared for performance on WAIS Information and Similarities, and on Thorndike-Gallup Vocabulary. Intergroup differences are not significant, but the normals tend to score higher on all tests. Pattern of performance is similar for both groups. Weighted information scores are significantly higher than Similarities scores, at the .01 level, for both the normals and depressives. A precipitate drop in quality of performance on the Similarities is found in relation to increase age within the 2 groups. The age factor is, thus, found to be more potent than depression in producing psychometric deficit, particularly in the area of abstraction and flexibility of thought processes. (PsycINFO Database Record (c) 2006 APA, all rights reserved)