Hello Experts,
I have successfully completed a multiple regression analysis with 3 covariates of no interest and 1 covariate of interest. Upon completing the analysis I identified several clusters from my tbss_vox_p_tstat1.nii.gz file (uncorrected at 0.001) and determined the mean FA for each region across all of my participants. However, when I use SPSS to explore the partial correlation between mean FA in each region and my covariate of interest (controlling for my 3 covariates of no interest) a couple of my p-values do not reach a significance level of 0.001. Does this mean that I have calculated something incorrectly, or is this just the result of two different statistical techniques (multiple regression vs. correlation)? Also, should I even control for my 3 covariates of interest when running the correlation since these regions were selected from the multiple regression analysis.
Cheers
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