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Ingebo, George S.; Doherty, Victor W. – 1982
The Portland (Oregon) Public Schools undertook studies of regression based on a three-year data base of fall and spring test results in grades 3 through 8 in reading, language usage and mathematics. The objective of these regression studies was to determine the amount of correction for regression to the mean needed to accurately represent the…
Descriptors: Achievement Gains, Elementary Education, Language Arts, Latent Trait Theory
