Development of the Computerized Adaptive Testing Version of the Armed Services Vocational Aptitude Battery
The Computerized Adaptive Testing version of the Armed Services Vocational Aptitude Battery (CAT-ASVAB) is one of the most thoroughly researched tests of human proficiencies in modern history. Data from over 400,000 test-takers collected over a 20-year period have been used to address crucial research and development issues. In spite of its lengthy and thorough development cycle, CAT-ASVAB was the first large-scale adaptive battery to be administered in a high-stakes setting, influencing the qualification status of applicants for the U.S. Armed Forces. CAT-ASVAB was first used operationally in Septem ber 1990 at six locations. From 1990 to 1996, about 7% of all military appli cants were administered the adaptive version. In 1996, implementation of a new CAT-ASVAB system began at 65 Military Entrance Processing Sta tions. CAT-ASVAB is currently used to test about two-thirds of all appli cants, resulting in administration rates of over 400,000 adaptive tests annually. This chapter outlines the development of the battery and describes
some of the challenges and dilemmas faced in constructing a CAT version that is interchangeable with its preexisting paper-and-pencil (P&P) counterpart.