The construction of a personality scale to predict scholastic achievement

Abstract

The development of a 36-item personality scale (Hr subtest in the California Psychological Inventory) to predict under-graduate grades is described. With 11 college cross-validation samples, a mean r with course grades of .38 was obtained; 6 high school samples yielded a mean r of .36. That the Hr scale is a predictor of achievement and not merely a measure of intellect is concluded on the basis of a mean correlation of .38 with achievement and .26 with measures of intellect in 8 samples. (PsycInfo Database Record (c) 2025 APA, all rights reserved)