Imagine that a researcher conducts a study to compare rote memorization with elaborative encoding in low-stress and high-stress students. The researcher finds a bigger difference between rote memorization and elaborative encoding in the high-stress students than in the low-stress students, and this leads to a significant interaction in an ANOVA.


Required:

Why might the researcher want to follow this up with separate t tests for the low- and high-stress subjects comparing rote memorization and elaborative encoding in each type of subject?