Armed Services Vocational Aptitude Battery: Development of Forms 11, 12, and 13. Volume 2.
Final rept. Oct 81-May 85,
ASSESSMENT SYSTEMS CORP ST PAUL MN
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This report describes the development of the Armed Services Vocational Aptitude Battery ASVAB Forms 11, 12, and 13. The items for the new forms were supplied by the Air Force Human Resources Laboratory AFHRL. They were administered to examinees in Recruit Training Centers RTCs along with items in the ASVAB 8b, a test battery parallel to the reference test used in this study, ASVAB 8a, as part of a previous research efforts. Using the pretest data, eight new power subtests were constructed by matching classical item statistics for the new itmes to corresponding ASVAB 8b items. Comparisons of classical and item response theory IRT item statistics suggested that the newly developed subtests should be parallel among themselves and to ASVAB 8b. Complete new ASVAB test batteries and ASVAB 8a were administered to examinees in RTCs using an equivalent-groups design. In addition, partial batteries of ASVAB Form 11a judged to be the most central of the new forms and ASVAB 8a were administered to examinees at Military Entrance Processing Stations MEPS. The demographic statistics for the RTC and MEPS samples indicated that assumptions of the equivalent groups design were met. Summary score statistics were computed for each subtest administered in order to determine if like-named subtests were parallel. Classical item statistics and IRT parameters showed that new subtests were more parallel among themselves than they were to the like-named ASVAB 8a subtests.