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A Top-Down Approach For Optimally Designing Multistage-Adaptive Tests, Hwanggyu Lim
A Top-Down Approach For Optimally Designing Multistage-Adaptive Tests, Hwanggyu Lim
Doctoral Dissertations
In multistage-adaptive testing (MST), there are many interrelated design variables that impact the nature and quality of ability estimation. Previous research has identified general principles for the effective design of MSTs in terms of measurement performance. However, those principles are unlikely to apply uniformly to every testing context. The purpose of this dissertation is to propose a process of finding an MST design that has optimal measurement properties, given a specific set of test circumstances. To achieve this goal, an efficient strategy was introduced at each of three phases to discover the optimal design of the MST; constructing MSTs, systematically …
An Investigation Of Subtest Score Equating Methods Under Classical Test Theory And Item Response Theory Frameworks, Minjeong Shin
An Investigation Of Subtest Score Equating Methods Under Classical Test Theory And Item Response Theory Frameworks, Minjeong Shin
Doctoral Dissertations
Test scores are usually equated only at the total score level. If a test mainly measures a single trait, indicating that the test is essentially unidimensional, equating at the total score level could be the best choice. However, when a test is composed of subtests having negligible relationships among them, separate equating for each subtest offers the best choice. Given a moderate amount of correlations among the subtests, performing individual equating for each subtest may be misleading in that it ignores the relationship of the subtests. This study applied and compared several possible subtest score equating methods based on classical …