In a 2 age) x 2 type of therapy) factorial design, which of the following outcomes would be an example of an interaction?
A) young adults do better in therapy A; older adults also do better with this therapy
B) therapy A works better for young adults, while therapy B works better for older adults
C) therapy B works better overall, and this is true for both young and old adults
D) older adults improve more than younger adults, regardless of type of therapy

Question

Quizplus · Accepted Answer

An interaction effect occurs when the effect of one independent variable on the dependent variable changes across the levels of another independent variable. In this case, the effectiveness of the therapy type changes depending on the age group, which is an interaction between the type of therapy and age.

In a 2 Age) X 2 Type of Therapy) Factorial