Hello Afni experts,
I wanted to find out the best way to get a correlation (pearson ideally) between two data sets. The 2 datasets are the same subject (native space) with the voxels of one image filled with STDEV values of a measure and the other image filled with %signal change. There is only one subbrick per dataset (not timeseries data).

I wanted to see if 3ddot with the demean option would give a pearson correlation or if not, what type of correlation would it be? If it is not a peason correlation, is there a tool which would do this for a single volume. For example 3dTcorr functions require a timeseries whereas my data is not a timeseries so these functions crash.

Would another option be 3dttest++ using one sided and using one dataset brick as a covariate? Would this be better to show how these values relate within a mask for a single subject analysis?

Thanks,
Ajay