TY - CHAP T1 - Testlet response theory: An analog for the 3PL model useful in testlet-based adaptive testing Y1 - 2000 A1 - Wainer, H., A1 - Bradlow, E. T. A1 - Du, Z. CY - W. J. van der Linden and C. A. W. Glas (Eds.), Computerized Adaptive Testing: Theory and Practice (pp. 245-270). Norwell MA: Kluwer. ER -