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Educational and Psychological Measurement
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An Empirical Comparison of Three Strategies Used in Extreme Group Designs

Rashmi Garg

Laurentian University

The relationship between variables in experimental research is often investigated through the use of extreme group designs. Alf and Abrahams (1975) have described three statistical strategies and their merits for estimating the relationships in such designs. This Monte Carlo study is designed to investigate empirically the efficacy of these procedures in terms of their power and mean square error. Alf and Abrahams' "covariance information statistic" (Strategy 2) proved to be the best in terms of estimation of correlation, power and mean square error for the correlation.

Educational and Psychological Measurement, Vol. 43, No. 2, 359-371 (1983)
DOI: 10.1177/001316448304300205
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