# Question: a When is it appropriate to compute the effect size

(a) When is it appropriate to compute the effect size in a two-way ANOVA?

(b) For each effect, what does the effect size tell you?

(b) For each effect, what does the effect size tell you?

## Relevant Questions

Below are the cell means of three experiments. For each experiment, compute the main effect means and decide whether there appears to be an effect of A, B, and/or A X B. (a) In question 17, why does the interaction contradict your conclusions about the effect of reward? (b) Why does the interaction contradict your conclusions about practice? (a) How do you recognize a correlational design? (b) To select a correlation coefficient, what must you ask about the variables? (c) What is the parametric correlation coefficient? (d) What is the nonparametric ...(a) What does a significant main effect indicate? (b) What does a significant interaction effect indicate? (c) Why do we usually base the interpretation of a two-way design on the interaction effect when it is significant? After testing 40 participants, a significant xobt of 13.31 was obtained. With a = .05 and df = 2, how would this result be reported in a publication?Post your question