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Puhan, Gautam; Boughton, Keith; Kim, Sooyeon – Journal of Technology, Learning, and Assessment, 2007
The study evaluated the comparability of two versions of a certification test: a paper-and-pencil test (PPT) and computer-based test (CBT). An effect size measure known as Cohen's d and differential item functioning (DIF) analyses were used as measures of comparability at the test and item levels, respectively. Results indicated that the effect…
Descriptors: Computer Assisted Testing, Effect Size, Test Bias, Mathematics Tests