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| Estimation (Mathematics) | 1 |
| Reliability | 1 |
| Statistical Bias | 1 |
| Test Format | 1 |
| Test Length | 1 |
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| Applied Measurement in… | 1 |
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| Feldt, Leonard S. | 1 |
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| Journal Articles | 1 |
| Reports - Research | 1 |
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| Iowa Tests of Basic Skills | 1 |
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Peer reviewedFeldt, Leonard S. – Applied Measurement in Education, 2002
Considers the degree of bias in testlet-based alpha (internal consistency reliability) through hypothetical examples and real test data from four tests of the Iowa Tests of Basic Skills. Presents a simple formula for computing a testlet-based congeneric coefficient. (SLD)
Descriptors: Estimation (Mathematics), Reliability, Statistical Bias, Test Format
