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Peer reviewedAbrams, Allan S.; And Others – Journal of Experimental Education, 1979
Evaluation of large-scale programs is problematical because of inherent bias in assignment of treatment and control groups, resulting in serious regression artifacts even with the use of analysis of covariance designs. Nonuniformity of program implementation across sites and classrooms is also a problem. (Author/GSK)
Descriptors: Analysis of Covariance, Comparative Analysis, Compensatory Education, Educational Assessment
