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| Comparative Analysis | 1 |
| Correlation | 1 |
| Experimental Groups | 1 |
| Mathematical Models | 1 |
| Methods Research | 1 |
| Research Design | 1 |
| Research Methodology | 1 |
| Sampling | 1 |
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| Psychometrika | 1 |
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Peer reviewedAlf, Edward F., Jr.; Abrahams, Norman M. – Psychometrika, 1975
In applied and experimental research, it has been demonstrated that the extreme groups procedure is more powerful than the standard correlational approach for some values of the correlation and extreme group size. Methods are provided for using the covariance information that is usually discarded in the classical extreme groups approach.…
Descriptors: Comparative Analysis, Correlation, Experimental Groups, Mathematical Models
