Estimating Treatment Effects and Precision for Quasi-Experiments Assuming Differential Group and Individual Growth Patterns [electronic resource] / Stephen F. Olejnik and Andrew C. Porter.
The statistical properties of two methods of estimating gain scores for groups in quasi-experiments are compared: (1) gains in scores standardized separately for each group; and (2) analysis of covariance with estimated true pretest scores. The fan spread hypothesis is assumed for groups but not nec...
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| Format: | Electronic eBook |
| Language: | English |
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[S.l.] :
Distributed by ERIC Clearinghouse,
1978.
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Internet
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| Call Number: |
ED159223
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| ED159223 | Available |