hi there,
i used one way between groups ANOVA for my data, 3 groups, the overall result was non significant, so I did not follow any planned contrasts ( 2 planned contrasts).
however, I was told that I may need to run 2 a priori analysis for indenpendent samples t test for two groups, two tailed , but because the data is already collected then I have to run sensitivity power based on the sample I was given. I have 2 effect size for both groups ( anger group 0.08, fear group, 0.10)
I uploaded my data file www.webpower.psychstat.org/models/means03/effectsize.php
regards