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Download full textCrane, Laura R.; Cech, Joseph – 1979
Normal curve equivalent achievement gains estimates were compared with RMC Title I evaluation Models A1 and B1. The comparison focused upon the amount of bias introduced by Model A1 when its underlying assumptions were violated. The model assumes, first, that the local school population is accurately represented by the national norm group; and…
Descriptors: Achievement Gains, Compensatory Education, Control Groups, Early Childhood Education
