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Download full textWillson, Victor L.; Putnam, Richard R. – 1979
A meta-analysis of 29 separate studies investigating pretest effects was conducted. Outcomes of the studies (achievement gains or attitude improvements) were computed as standardized differences between pretested and non-pretested groups. Eleven other variables were coded for each outcome. Initial descriptive statistics were indicative of…
Descriptors: Achievement Gains, Attitude Change, Control Groups, Experimental Groups
