Search results for author:"Tianyou Wang"
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Precision of Warm's Weighted Likelihood Estimates for a Polytomous Model in Computerized Adaptive Testing
Applied Psychological Measurement Vol. 25, No. 4 (2001) pp. 317–31
Evaluated the relative accuracy of the weighted likelihood estimate (WLE) of T. Warm (1989) compared to the maximum likelihood estimate (MLE), expected a posteriori estimate, and maximum a posteriori estimate. Results of the Monte Carlo study, which ...
Psychometrika Vol. 71, No. 1 (March 2006) pp. 105–120
This paper deals with optimal partitioning of limited testing time in order to achieve maximum total test score. Nonlinear optimization theory was used to analyze this problem. A general case using a generic item response model is first presented. A ...
Journal of Educational Measurement Vol. 35, No. 2 (1998) pp. 109–35
Used simulations of computerized adaptive tests to evaluate results yielded by four commonly used ability estimation methods: maximum likelihood estimation (MLE) and three Bayesian approaches. Results show clear distinctions between MLE and Bayesian ...
Annual Meeting of the American Educational Research Association 2000 (April 2000)
This paper proposes a new Information-Time index as the basis for item selection in computerized classification testing (CCT) and investigates how this new item selection algorithm can help improve test efficiency for item pools with mixed item...
Annual Meeting of the American Educational Research Association 1999 (April 1999)
A study was conducted to extend the sequential probability ratio testing (SPRT) procedure with the polytomous model under some practical constraints in computerized classification testing (CCT), such as methods to control item exposure rate, and to...
Comparing and Combining Dichotomous and Polytomous Items with SPRT Procedure in Computerized Classification Testing
Annual Meeting of the American Educational Research Association 1998 (April 1998)
The purposes of this study were to: (1) extend the sequential probability ratio testing (SPRT) procedure to polytomous item response theory (IRT) models in computerized classification testing (CCT); (2) compare polytomous items with dichotomous...
Journal of Educational Measurement Vol. 38, No. 1 (2001) pp. 19–49
Reviews research literature on comparability issues in computerized adaptive testing (CAT) and synthesizes issues specific to comparability and test security. Develops a framework for evaluating comparability that contains three categories of...
Applied Psychological Measurement Vol. 23, No. 3 (1999) pp. 263–78
Extended the use of a beta prior in trait estimation to the maximum expected a posteriori (MAP) method of Bayesian estimation. This new method, essentially unbiased MAP, was compared with MAP, essentially unbiased expected a posteriori, weighted...
Can Examinees Use a Review Option To Obtain Positively Biased Ability Estimates on a Computerized Adaptive Test?
Journal of Educational Measurement Vol. 36, No. 2 (1999) pp. 141–57
Investigated the effectiveness of H. Wainer's (1993) strategy for obtaining positively biased ability estimates when examinees can review and change answers on computerized adaptive tests. Results, based on simulation and testing data from 87...