TY - CHAP T1 - Test overlap rate and item exposure rate as indicators of test security in CATs Y1 - 2009 A1 - Barrada, J A1 - Olea, J. A1 - Ponsoda, V. A1 - Abad, F. J. CY - D. J. Weiss (Ed.), Proceedings of the 2009 GMAC Conference on Computerized Adaptive Testing. N1 - PDF File, 261 K ER -