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| Effect Size | 1 |
| Error of Measurement | 1 |
| Evaluation Methods | 1 |
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| Item Response Theory | 1 |
| Psychological Testing | 1 |
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| Chen, Hsueh-Chu | 1 |
| Wang, Wen-Chung | 1 |
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Direct linkWang, Wen-Chung; Chen, Hsueh-Chu – Educational and Psychological Measurement, 2004
As item response theory (IRT) becomes popular in educational and psychological testing, there is a need of reporting IRT-based effect size measures. In this study, we show how the standardized mean difference can be generalized into such a measure. A disattenuation procedure based on the IRT test reliability is proposed to correct the attenuation…
Descriptors: Test Reliability, Rating Scales, Sample Size, Error of Measurement
