Aptitude by treatment interactions are investigated in the context of paired associate learning. Individuals are grouped by preference for visual or verbal items on classifying lists of paired associates and these groups are used to predict performance on criterion lists. (DG)

Similarities between regression analysis and analysis of variance are noted and it is argued that the former has advantages over the latter. It is also argued that canonical correlation analysis is more suitable than factor analysis in certain cases. The argument is illustrated with four recent pieces of educational research. (DG)