Methods exist for testing the homogeneity of group regression for the case in which there is only one predictor. Studies which have investigated aptitude-treatment interactions have adopted the homogeneity of regressions test as standard methodology for assessing the difference in regression slopes across treatments. Additional statistical…

The procedure used in this study to validate the behavioral categories was found to be a useful method for examining the validity of all classroom observation systems. (Author/DEP)

Evaluated is the validity of the behavioral categories held in common among three classroom observation systems. The validity model employed was that reported by Campbell and Fiske (1959) which requires that both convergent and discriminant validity be demonstrated. These procedures were applied to data obtained from the videotapes of 62 teacher…

Five studies identifying the relationships between teacher behavior and pupil achievement are reviewed. The purpose of the review is to report the most practical implications for teacher education. The behaviors listed in these studies represent only those teacher processes, skills, or performances that have exhibited statistically significant…

Statistical procedures are presented for determining ordinal and disordinal aptitude-treatment interactions with linear and curvilinear data. The paper presents a method for testing the homogeneity of group regressions for a single aptitude and provides models for expanding this test to linear and curvilinear regression planes. Procedures are…