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 afternoon,but the older people performed better than the younger people when they were tested in the morning.The different effect of age at the two times of day represents
A) a main effect.
B) an interaction effect.
C) a correlational effect.
D) a simple comparison effect.

Question

Quizplus · Accepted Answer

This represents an interaction effect between age and time of day on memory performance. The effect of age on memory performance depends on the time of day in which the participants were tested. This is not a main effect because the effect of age is not consistent across all levels of time of day. It is not a correlational effect because the study involves a manipulation of age and time of day, not just a correlation between them. It is not a simple comparison effect because there are multiple comparisons being made between age and time of day.

In a Complex Design Experiment,researchers Found That Younger and Older