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West, Leo H. T.; Theobald, John H. – 1981
This paper describes an analytical solution to a common problem in aptitude-treatment interaction (ATI). The researcher is often interested in the comparison between treatments for a large set of attributes. If this set is large, the chance of non-orthogonality is correspondingly large. In these circumstances the analysis and interpretation…
Descriptors: Academic Achievement, Aptitude Treatment Interaction, Biology, Foreign Countries
Peer reviewed Peer reviewed
Fraser, Barry J. – Multiple Linear Regression Viewpoints, 1979
A model for research on teacher effects in which the variance in student outcome post-test performance is attributed to pre-test perfomance; to separate construct domains of student, instructional, and teacher variables; and to interactions between variables in these three construct domains is presented and tested. (Author/JKS)
Descriptors: Achievement Gains, Foreign Countries, Junior High Schools, Mathematical Models