3dTcorr1D -dot product issue


I am running the following command, but the dot products I am getting are outside of the -1 to 1 range. Any idea why this might be happening?

3dTcorr1D -dot -prefix dot_c_{$roi}{$dyad}{$cond} ptoc_pb_{$dyad}{$cond}+tlrc ptoc_cb{$dyad}_{$cond}BN{$roi}_mask.rs.1D

Thank you!

The help says that it just computes the dot product without any normalization with -dot.

-dot = Doesn’t actually compute a correlation coefficient; just
calculates the dot product between the y1D vector(s)
and the dataset time series.

Either leave it out to get the Pearson correlation coefficient or choose one of the other options.