A Short Form of the California Psychological Inventory

Abstract

The number of items in the California Psychological Inventory (CPI) was reduced from 480 to 240 by selecting items representative of factors obtained by separate factor analyses of the 18 scales. Correlations of the short form with the standard scales, the factor structure of the short form, cross-validated regression equations to estimate standard scale scores, and test-retest reliability coefficients indicated that the short form was a reasonable alternative to the complete inventory in situations where time savings are required.