ERIC Number: EJ1019083
Record Type: Journal
Publication Date: 2013-Oct
Abstractor: As Provided
Reference Count: 15
A Comparison of Exposure Control Procedures in CATs Using the 3PL Model
Leroux, Audrey J.; Lopez, Myriam; Hembry, Ian; Dodd, Barbara G.
Educational and Psychological Measurement, v73 n5 p857-874 Oct 2013
This study compares the progressive-restricted standard error (PR-SE) exposure control procedure to three commonly used procedures in computerized adaptive testing, the randomesque, Sympson-Hetter (SH), and no exposure control methods. The performance of these four procedures is evaluated using the three-parameter logistic model under the manipulated conditions of item pool size (small vs. large) and stopping rules (fixed-length vs. variable-length). PR-SE provides the advantage of similar constraints to SH, without the need for a preceding simulation study to execute it. Overall for the large and small item banks, the PR-SE method administered almost all of the items from the item pool, whereas the other procedures administered about 52% or less of the large item bank and 80% or less of the small item bank. The PR-SE yielded the smallest amount of item overlap between tests across conditions and administered fewer items on average than SH. PR-SE obtained these results with similar, and acceptable, measurement precision compared to the other exposure control procedures while vastly improving on item pool usage.
Descriptors: Computer Assisted Testing, Adaptive Testing, Comparative Analysis, Statistical Analysis, Item Banks, Test Items, Selection, Testing
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Publication Type: Journal Articles; Reports - Research
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