Descriptor
| Achievement Gains | 1 |
| Error of Measurement | 1 |
| Individual Differences | 1 |
| Measurement Techniques | 1 |
| Reliability | 1 |
| Research Methodology | 1 |
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| Statistical Analysis | 1 |
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| True Scores | 1 |
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| Journal of Educational… | 1 |
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| Rogosa, David R. | 1 |
| Willett, John B. | 1 |
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Peer reviewedRogosa, David R.; Willett, John B. – Journal of Educational Measurement, 1983
Demonstrating good reliability for the difference score in measurement, the results of this study indicate that the difference score is often highly reliable when the correlation between true change and true initial status is nonnegative. In general, when individual differences in true change are appreciable, the difference score shows strong…
Descriptors: Achievement Gains, Error of Measurement, Individual Differences, Measurement Techniques
