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Download full textCross, Lawrence H.; Lane, Carolyn E. – 1977
Action research often necessitates the use of intact groups for the comparison of educational treatments or programs. This paper considers several analytical methods that might be used for such situations when pretest scores indicate that these intact groups differ significantly initially. The methods considered include gain score analysis of…
Descriptors: Achievement Gains, Analysis of Covariance, Analysis of Variance, Control Groups
