Hi John,

For that you would need to have created four conditions: pre-visual (those scans associated with the visual task pre-intervention), pre-auditory (those scans associated with the auditory task pre-intervention), post-visual, and post-auditory. Then you would:

1) select pre-visual and post-visual conditions and enter a [-1 1] contrast to look at the effect of intervention in the visual scans
2) select pre-auditory and post-auditory conditions and enter a [-1 1] contrast to look at the effect of intervention in the auditory scans
3) select pre-visual, pre-auditory, post-visual, post-auditory conditions and enter a [-1 1 1 -1] contrast to look at the interaction between task and intervention

Hope this helps
Alfonso

Originally posted by John Johnson: