The Ball Aptitude Battery (BAB) is a multiple ability test battery of specific work skills for use in career counseling. This study reports on ability changes by gender, race, and socioeconomic status in a BAB retest of 112 young adults four years after their initial testing. The sample consisted of 68 females and 44 males; 15 Blacks, 21 Hispanics, and 76 Whites. Test-retest correlations ranged from .32 to .88, with a median of .62. Results showed that: (1) gender and race differentially influenced ability level, but socioeconomic status did not; (2) there was no interaction between these three variables and trial (test vs. retest); and (3) three demographic variables had little effect on the ability change scores over the 4-year period. However, abilities were observed to develop (change positively) into young adulthood. (Author/BS)