The three methods of analysis of pretest-posttest data discussed by Huck and McLean (1975) are translated into correlational terms. This translation adds depth to their discussion. Their conclusion that gain-score analysis is preferred to the analysis of variance of repeated measures is modified, but their preference for the analysis of covariance is reinforced.
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References
1.
HuckS. W.McLeanR. A.Using a repeated measures ANOVA to analyze the data from a pretest-posttest design: A potentially confusing task. Psychological Bulletin, 1975, 82, 511–518.
