In a study with three levels of factor A, three levels of factor B, and six participants in each condition, the df for the interaction of A x B would be
A)9
B)6
C)4
D)3

Question

In a study with three levels of factor A, three levels of factor B, and six participants in each condition, the df for the interaction of A x B would be
A)9​
B)6
C)4
D)3

Quizplus · Accepted Answer

The formula for df of the interaction of two factors is (a-1)*(b-1), where a is the number of levels of factor A and b is the number of levels of factor B. Plugging in the values, we get (3-1)*(3-1) = 4.

In a Study with Three Levels of Factor A, Three