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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
