TY - JOUR T1 - Item selection in computerized adaptive testing: Improving the a-stratified design with the Sympson-Hetter algorithm JF - Applied Psychological Measurement Y1 - 2002 A1 - Leung, C. K. A1 - Chang, Hua-Hua A1 - Hau, K. T. VL - 26 SN - 0146-6216 ER -