Repeated measures ANOVA controlled by co-variable. Why I can not carry out a posthoc in co-variable?
I hope everything is going well.
I am writing because I need to carry out some statistical analyses and I am very naive on it. Given that I have a question:
I have carried out a repeated measures ANOVA 2x2x2. I have controled by a co-variable (Autistic Quotient), and I got some significative interactions (p-value < 0,05).
I performed a post-hoc analysis, but it is not possible to do it with AQ, even when I have a significan interacion between the variables "pse_condition * AQ" and "pse_condition * block * AQ". Do you have any clue about why I can not perform that analysis? Is there another way to know where is the significant interaction occurring?
Many thank in advance!! and best wishes for your statistical enterprises,