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Raffeld, Paul; Reynolds, William M. – 1977
The pretest-posttest design referred to as Design 2 by Campbell and Stanley (1963) is commonly used in educational research and evaluation. The tenability of the assumption of a zero population difference commonly used with this design is questioned. A nonzero population estimate based on the mean difference observed in test-retest reliability…
Descriptors: Control Groups, Correlation, Experimental Groups, Hypothesis Testing
SCHWAGER, SIDNEY – 1967
IN THIS REPORT THE UNITED FEDERATION OF TEACHERS (UFT) ANALYZES SPECIFIC DATA FROM THE CENTER FOR URBAN EDUCATION'S (CUE) NEGATIVE EVALUATION OF NEW YORK CITY'S MORE EFFECTIVE SCHOOLS (MES) PROGRAM AND CHARGES THAT CUE'S CONCLUSIONS ARE INVALID. THE UFT MAINTAINS THAT SINCE 18 OF THE 21 MES WERE FORMER SPECIAL SERVICE (SS) SCHOOLS, CUE SHOULD HAVE…
Descriptors: Achievement Gains, Arithmetic, Comparative Analysis, Control Groups