TY - JOUR T1 - Computerized adaptive testing with the partial credit model: Estimation procedures, population distributions, and item pool characteristics JF - Applied Psychological Measurement Y1 - 2005 A1 - Gorin, J. A1 - Dodd, B. G. A1 - Fitzpatrick, S. J. A1 - Shieh, Y. Y. VL - 29 ER - TY - CONF T1 - A comparison of exposure control procedures in CAT systems based on different measurement models for testlets using the verbal reasoning section of the MCAT T2 - Paper presented at the Annual meeting of the National Council on Measurement in Education Y1 - 2003 A1 - Boyd, A. M A1 - Dodd, B. G. A1 - Fitzpatrick, S. J. JF - Paper presented at the Annual meeting of the National Council on Measurement in Education CY - Chicago IL N1 - {PDF file, 405 KB} ER - TY - JOUR T1 - An examination of exposure control and content balancing restrictions on item selection in CATs using the partial credit model JF - Journal of Applied Measurement Y1 - 2003 A1 - Davis, L. L. A1 - Pastor, D. A. A1 - Dodd, B. G. A1 - Chiang, C. A1 - Fitzpatrick, S. J. KW - *Computers KW - *Educational Measurement KW - *Models, Theoretical KW - Automation KW - Decision Making KW - Humans KW - Reproducibility of Results AB - The purpose of the present investigation was to systematically examine the effectiveness of the Sympson-Hetter technique and rotated content balancing relative to no exposure control and no content rotation conditions in a computerized adaptive testing system (CAT) based on the partial credit model. A series of simulated fixed and variable length CATs were run using two data sets generated to multiple content areas for three sizes of item pools. The 2 (exposure control) X 2 (content rotation) X 2 (test length) X 3 (item pool size) X 2 (data sets) yielded a total of 48 conditions. Results show that while both procedures can be used with no deleterious effect on measurement precision, the gains in exposure control, pool utilization, and item overlap appear quite modest. Difficulties involved with setting the exposure control parameters in small item pools make questionable the utility of the Sympson-Hetter technique with similar item pools. VL - 4 N1 - 1529-7713Journal Article ER - TY - CONF T1 - Alternatives for scoring computerized adaptive tests T2 - Paper presented at an Educational Testing Service-sponsored colloquium entitled Computer-based testing: Building the foundations for future assessments Y1 - 1998 A1 - Dodd, B. G. A1 - Fitzpatrick, S. J. JF - Paper presented at an Educational Testing Service-sponsored colloquium entitled Computer-based testing: Building the foundations for future assessments CY - Philadelphia PA ER - TY - CHAP T1 - Alternatives for scoring computerized adaptive tests T2 - Computer-based testing Y1 - 1998 A1 - Dodd, B. G. A1 - Fitzpatrick, S. J. ED - J. J. Fremer ED - W. C. Ward JF - Computer-based testing PB - Lawrence Erlbaum Associates, Inc. CY - Mahwah, N.J., USA ER - TY - JOUR T1 - The effect of population distribution and method of theta estimation on computerized adaptive testing (CAT) using the rating scale model JF - Educational & Psychological Measurement Y1 - 1997 A1 - Chen, S-K. A1 - Hou, L. Y. A1 - Fitzpatrick, S. J. A1 - Dodd, B. G. KW - computerized adaptive testing AB - Investigated the effect of population distribution on maximum likelihood estimation (MLE) and expected a posteriori estimation (EAP) in a simulation study of computerized adaptive testing (CAT) based on D. Andrich's (1978) rating scale model. Comparisons were made among MLE and EAP with a normal prior distribution and EAP with a uniform prior distribution within 2 data sets: one generated using a normal trait distribution and the other using a negatively skewed trait distribution. Descriptive statistics, correlations, scattergrams, and accuracy indices were used to compare the different methods of trait estimation. The EAP estimation with a normal prior or uniform prior yielded results similar to those obtained with MLE, even though the prior did not match the underlying trait distribution. An additional simulation study based on real data suggested that more work is needed to determine the optimal number of quadrature points for EAP in CAT based on the rating scale model. The choice between MLE and EAP for particular measurement situations is discussed. (PsycINFO Database Record (c) 2003 APA, all rights reserved). VL - 57 N1 - Sage Publications, US ER - TY - JOUR T1 - The effect of population distribution and methods of theta estimation on computerized adaptive testing (CAT) using the rating scale model JF - Educational and Psychological Measurement Y1 - 1997 A1 - Chen, S. A1 - Hou, L. A1 - Fitzpatrick, S. J. A1 - Dodd, B. VL - 57 ER - TY - CONF T1 - The effects of methods of theta estimation, prior distribution, and number of quadrature points on CAT using the graded response model T2 - Paper presented at the annual meeting of the American Educational Research Association Y1 - 1996 A1 - Hou, L. A1 - Chen, S. A1 - Dodd. B. G. A1 - Fitzpatrick, S. J. JF - Paper presented at the annual meeting of the American Educational Research Association CY - New York NY ER - TY - CONF T1 - The effect of population distribution and methods of theta estimation on CAT using the rating scale model T2 - Paper presented at the annual meeting of the American Educational Research Association Y1 - 1995 A1 - Chen, S. A1 - Hou, L. A1 - Fitzpatrick, S. J. A1 - Dodd, B. G. JF - Paper presented at the annual meeting of the American Educational Research Association CY - San Francisco ER - TY - JOUR T1 - Computerized adaptive measurement of attitudes JF - Measurement and Evaluation in Counseling and Development Y1 - 1990 A1 - Koch, W. R. A1 - Dodd, B. G. A1 - Fitzpatrick, S. J. VL - 23 ER -