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As part of their review of the estimation and use of “change” scores, Cronbach and Furby and O’Connor recommended procedures designed to increase the precision of estimators of individual true gain. The intent was to develop estimators which yielded smaller mean squares of (D∞ –D∞), where (D∞ is...
Mothers of Mexican-American first-graders were divided into four groups according to the Solomon design. Experimental mothers were trained to use modeling, cueing, and reinforcement to influence their first-graders’ question-asking; control mothers were not. The effects of treatment on the...
In light of the failure of most attempts to replicate the original demonstration of potent teacher expectancy effects by Rosenthal and Jacobson (1968), the following study was performed. Within each of ten first grade classes for educationally deprived students, one half of the pupils were...
I was most pleased by the recent publication by Brewer, “On the Power of Statistical Tests in theAmerican Educational Research Journal” 1972, and understandably delighted with his heavy reliance, in accomplishing his survey, on my power handbook (Cohen, 1969). I strongly agree with his stress on...
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