The Use of Extreme Groups in Assessing Relationships.

Alf, Edward F., Jr.; Abrahams, Norman M.

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Peer reviewed

ERIC Number: EJ133684

Record Type: Journal

Publication Date: 1975

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The Use of Extreme Groups in Assessing Relationships

Alf, Edward F., Jr.; Abrahams, Norman M.

Psychometrika, 40, 4, 563-72, Dec 75

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. (Author/BJG)

Descriptors: Comparative Analysis, Correlation, Experimental Groups, Mathematical Models, Methods Research, Research Design, Research Methodology, Sampling

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