%0 Journal Article %J Applied Psychological Measurement %D 1995 %T Computerized adaptive testing with polytomous items %A Dodd, B. G. %A De Ayala, R. J., %A Koch, W. R. %X Discusses polytomous item response theory models and the research that has been conducted to investigate a variety of possible operational procedures (item bank, item selection, trait estimation, stopping rule) for polytomous model-based computerized adaptive testing (PCAT). Studies are reviewed that compared PCAT systems based on competing item response theory models that are appropriate for the same measurement objective, as well as applications of PCAT in marketing and educational psychology. Directions for future research using PCAT are suggested. %B Applied Psychological Measurement %V 19 %P 5–22. %G eng %0 Journal Article %J Educational and Psychological Measurement %D 1995 %T An investigation of procedures for computerized adaptive testing using the successive intervals Rasch model %A Koch, W. R. %A Dodd, B. G. %B Educational and Psychological Measurement %V 55 %P 976-990. %G eng %0 Journal Article %J Educational and Psychological Measurement %D 1993 %T Computerized adaptive testing using the partial credit model: Effects of item pool characteristics and different stopping rules %A Dodd, B. G. %A Koch, W. R. %A De Ayala, R. J., %X Simulated datasets were used to research the effects of the systematic variation of three major variables on the performance of computerized adaptive testing (CAT) procedures for the partial credit model. The three variables studied were the stopping rule for terminating the CATs, item pool size, and the distribution of the difficulty of the items in the pool. Results indicated that the standard error stopping rule performed better across the variety of CAT conditions than the minimum information stopping rule. In addition it was found that item pools that consisted of as few as 30 items were adequate for CAT provided that the item pool was of medium difficulty. The implications of these findings for implementing CAT systems based on the partial credit model are discussed. %B Educational and Psychological Measurement %V 53 %P 61-77. %G eng %0 Journal Article %J Applied Measurement in Education %D 1992 %T A comparison of the partial credit and graded response models in computerized adaptive testing %A De Ayala, R. J. %A Dodd, B. G. %A Koch, W. R. %B Applied Measurement in Education %V 5 %P 17-34 %G eng %0 Journal Article %J Measurement and Evaluation in Counseling and Development %D 1990 %T Computerized adaptive measurement of attitudes %A Koch, W. R. %A Dodd, B. G. %A Fitzpatrick, S. J. %B Measurement and Evaluation in Counseling and Development %V 23 %P 20-30 %G eng %0 Journal Article %J Journal of Educational Measurement %D 1990 %T A simulation and comparison of flexilevel and Bayesian computerized adaptive testing %A De Ayala, R. J., %A Dodd, B. G. %A Koch, W. R. %K computerized adaptive testing %X Computerized adaptive testing (CAT) is a testing procedure that adapts an examination to an examinee's ability by administering only items of appropriate difficulty for the examinee. In this study, the authors compared Lord's flexilevel testing procedure (flexilevel CAT) with an item response theory-based CAT using Bayesian estimation of ability (Bayesian CAT). Three flexilevel CATs, which differed in test length (36, 18, and 11 items), and three Bayesian CATs were simulated; the Bayesian CATs differed from one another in the standard error of estimate (SEE) used for terminating the test (0.25, 0.10, and 0.05). Results showed that the flexilevel 36- and 18-item CATs produced ability estimates that may be considered as accurate as those of the Bayesian CAT with SEE = 0.10 and comparable to the Bayesian CAT with SEE = 0.05. The authors discuss the implications for classroom testing and for item response theory-based CAT. %B Journal of Educational Measurement %V 27 %P 227-239 %G eng %0 Journal Article %J Applied Measurement in Education %D 1989 %T An investigation of procedures for computerized adaptive testing using partial credit scoring %A Koch, W. R. %A Dodd, B. G. %B Applied Measurement in Education %V 2 %P 335-357 %G eng %0 Journal Article %J Applied Psychological Measurement %D 1989 %T Operational characteristics of adaptive testing procedures using the graded response model %A Dodd, B. G. %A Koch, W. R. %A De Ayala, R. J., %B Applied Psychological Measurement %V 13 %P 129-143 %G eng %0 Journal Article %J Applied Psychological Measurement %D 1989 %T Operational Characteristics of Adaptive Testing Procedures Using the Graded Response Model %A Dodd, B. G. %A Koch, W. R. %A De Ayala, R. J. %B Applied Psychological Measurement %V 13 %P 129-143 %G English %N 2 %0 Conference Paper %B Paper presented at the annual meeting of the American Educational Research Association %D 1988 %T Computerized adaptive attitude measurement: A comparison of the graded response and rating scale models %A Dodd, B. G. %A Koch, W. R. %A De Ayala, R. J., %B Paper presented at the annual meeting of the American Educational Research Association %C New Orleans %G eng %0 Conference Paper %B Paper presented at the annual meeting of the National Council on Measurement in Education %D 1987 %T Computerized adaptive testing: A comparison of the nominal response model and the three-parameter logistic model %A De Ayala, R. J., %A Koch, W. R. %B Paper presented at the annual meeting of the National Council on Measurement in Education %C Washington DC %G eng %0 Conference Paper %B Paper presented at the annual meeting of the American Educational Research Association %D 1986 %T Operational characteristics of adaptive testing procedures using partial credit scoring %A Koch, W. R. %A Dodd. B. G. %B Paper presented at the annual meeting of the American Educational Research Association %C San Francisco CA %G eng %0 Journal Article %J Applied Psychological Measurement %D 1985 %T ALPHATAB: A lookup table for Bayesian computerized adaptive testing %A De Ayala, R. J., %A Koch, W. R. %B Applied Psychological Measurement %V 9 %P 326 %G eng %0 Conference Paper %B Paper presented at the annual meeting of the American Educational Research Association %D 1985 %T Computerized adaptive attitude measurement %A Koch, W. R. %A Dodd, B. G. %B Paper presented at the annual meeting of the American Educational Research Association %C Chicago %G eng %0 Book Section %D 1977 %T Student attitudes toward tailored testing %A Koch, W. R. %A Patience, W. M. %C D. J. Weiss (Ed.), Proceedings of the 1977 Computerized Adaptive Testing Conference. Minneapolis MN: University of Minnesota, Department of Psychology, Psychometric Methods Program. %G eng