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Cliff, N. A., Cudeck, R., & McCormick, D..  (1978).  Evaluations of implied orders as a basis for tailored testing using simulations (Technical Report No. 4). Los Angeles CA: University of Southern California, Department of Psychology.

Cliff, N. A., Cudeck, R., & McCormick, D..  (1977).  An empirical evaluation of implied orders as a basis for tailored testing. In . D. J. Weiss (Ed.), Proceedings of the 1977 Computerized Adaptive Testing Conference. Minneapolis MN: University of Minnesota, Department of Psychology, Psychometric Methods Program.