In a complex design experiment researchers found that younger and older people performed equally well on a memory task when they were tested in the morning,but the younger people performed better than the older people when they were tested in the afternoon.The different effect of age at the two times of day represents a(n)
A)main effect.
B)correlated effect.
C)interaction effect.
D)comparison effect.

Question

Quizplus · Accepted Answer

An interaction effect occurs when the effect of one variable on the outcome depends on the level of another variable. In this case, age has a different effect on memory performance in the morning vs. the afternoon, indicating an interaction between age and time of day. A main effect would occur if age or time of day alone had a consistent effect on memory performance regardless of the other variable. Correlated effect and comparison effect are not valid statistical terms.

In a Complex Design Experiment Researchers Found That Younger and Older