Dear all,

I am trying to perform a seed-to-voxel connectivity analysis with subject-specific but session-invariate ROIs (12/subject, several sessions for each subject). In the first-level results window, connectivity results are missing for certain ROIs only in certain individuals and in certain scan sessions (=conditions) and the "source timeseries" box does not show any timeseries signal in these cases. Consequently, my N is off in the second-level results...

The ROIs are all located correctly within the functional images (and anatomically in the structural grey matter mask at each session, for that matter). I tried to re-run the analysis including pre-processing, but to no avail.

Has anyone noticed similarly strange behavior? Where can I start the debugging?

Best regards,
Johann Philipp Zöllner