For each description below, indicate which type of effect is being tested (main effect or interaction): ·         In a multivalent design, three groups of subjects are exposed to three different types...

For each description below, indicate which type of effect is being tested (main effect or interaction):

·         In a multivalent design, three groups of subjects are exposed to three different types of stories to compare the effect of type of story on reading speed.

·         In a factorial design, researchers examine whether the effect of note-taking method (by hand or on computer) on test score depends on the type of class a student is taking.

·         A study tested the effects of both room color and presence/absence of plants on recovery time in a hospital. The individual effects of room color and presence/absence of plants were tested.