When breaking down a significant main effect, which of the following is true?
A) If there are only two conditions, planned contrasts are necessary
B) If there are only two conditions, neither planned nor post hoc contrasts are necessary
C) If there are only two conditions, post hoc contrasts are necessary
D) If there are only two conditions, both planned and post hoc contrasts are necessary

Question

Quizplus · Accepted Answer

When there are only two conditions, the significant main effect directly indicates the difference between these two conditions, making neither planned nor post hoc contrasts necessary. These contrasts are typically used to explore or confirm specific hypotheses about differences among three or more conditions.

When Breaking Down a Significant Main Effect, Which of the Following