This study examines the nature of the highly variable black-white difference across diverse tests and indicates the major systematic source of this between-population variation, namely, Spearman's g. Eleven large-scale studies (discussed in the appendix), each one comprising anywhere from 6 to 13 diverse tests, show a significant and substantial…

The purpose of this longitudinal study was to examine associations among background characteristics, commitment levels, institutional involvements, and persistence for male and female university students. Data were collected from college records and surveys completed by 316 university freshmen at the beginning of and 10 weeks into the 1984 fall…