Search results for author:"Robert D. Ankenmann"
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A Monte Carlo Study of Marginal Maximum Likelihood Parameter Estimates for the Graded Model
Robert D. Ankenmann; Clement A. Stone
Effects of test length, sample size, and assumed ability distribution were investigated in a multiple replication Monte Carlo study under the 1-parameter (1P) and 2-parameter (2P) logistic graded model with five score levels. Accuracy and...
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A Comparison of Item Selection Rules at the Early Stages of Computerized Adaptive Testing
Shu-Ying Chen; Robert D. Ankenmann; Hua-Hua Chang
Applied Psychological Measurement Vol. 24, No. 3 (2000) pp. 241–55
Compared five item selection rules with respect to the efficiency and precision of trait (theta) estimation at the early stages of computerized adaptive testing (CAT). The Fisher interval information, Fisher information with a posterior distribution,...