TY - ABST T1 - Exploring the relationship between item exposure rate and test overlap rate in computerized adaptive testing (ACT Research Report series 99-5) Y1 - 1999 A1 - Chen, S-Y. A1 - Ankenmann, R. D. A1 - Spray, J. A. CY - Iowa City IA: ACT, Inc N1 - (also National Council on Measurement in Education paper, 1999). ER -