Dimensionality of the Math Knowledge Item Pool for the Accelerated CAT-ASVAB (Computerized Adaptive Testing-Armed Services Vocational Aptitude Battery) Project

摘要

A computerized adaptive testing (CAT) version of the Armed Services Vocational Aptitude Battery (ASVAB) is being developed in the Accelerated CAT-ASVAB Project. The theory underlying CAT assumes that items in the pool for any subtest are unidimensional. This report examines the validity of the assumption for the Math Knowledge subtest by factor analyzing scores in different content areas.