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Adaptive Testing	2
Computer Assisted Testing	2
Estimation (Mathematics)	2
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Educational and Psychological…

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Dodd, Barbara G.	2
Chen, Ssu-Kuang	1
Hou, Liling	1

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A Comparison of Maximum Likelihood Estimation and Expected A Posteriori Estimation in CAT Using the Partial Credit Model.

Peer reviewed

Chen, Ssu-Kuang; Hou, Liling; Dodd, Barbara G. – Educational and Psychological Measurement, 1998

A simulation study was conducted to investigate the application of expected a posteriori (EAP) trait estimation in computerized adaptive tests (CAT) based on the partial credit model and compare it with maximum likelihood estimation (MLE). Results show the conditions under which EAP and MLE provide relatively accurate estimation in CAT. (SLD)

Descriptors: Adaptive Testing, Comparative Analysis, Computer Assisted Testing, Estimation (Mathematics)

Computerized Adaptive Testing Using the Partial Credit Model: Effects of Item Pool Characteristics and Different Stopping Rules.

Peer reviewed

Dodd, Barbara G.; And Others – Educational and Psychological Measurement, 1993

Effects of the following variables on performance of computerized adaptive testing (CAT) procedures for the partial credit model (PCM) were studied: (1) stopping rule for terminating CAT; (2) item pool size; and (3) distribution of item difficulties. Implications of findings for CAT systems based on the PCM are discussed. (SLD)

Descriptors: Adaptive Testing, Computer Assisted Testing, Computer Simulation, Difficulty Level