Male and female enlistees were compared on the basis of their performance on the Armed Services Vocational Aptitude Battery. Mean Aptitude Index scores were compared for male and female enlistees on the original testing and on retest. Males scored higher on mechanical and electronics, and females scored higher on administrative and general. Both males and females tended to do poorer on retest than they had on the original test. The Air Force Enlistment Attitude Survey administered shed no light on possible cause for lower scores on retest. Comparisons of test-retest correlations with expectations based on known test reliability suggests that non-standard testing conditions may prevail in operational testing. (Author/BW)