This Technical Research Report is primarily designed for reference by educational testing and measurement specialists as a supplemental guide to interpretation of Armed Services Vocational Aptitude Battery (ASVAB) results in local and state career guidance and counseling programs. This study examined the validity of specific ASVAB composities from a sample of 6,130 students in 25 high schools offering vocational-technical curricula. School samples were obtained through voluntary participation. A general conclusion indicates that, for the most part, form 2 of the ASVAB does do well in predicting success in a number of vocational-technical categories. For those categories where form 2 of the ASVAB does not appear to predict well, further exploration is needed to delineate the ability factors necessary for academic success in those categories. (Author/DEP)