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åThe output from 3dTstat will be four irf_mean datasets, one for each stimulus type.  Below are subject EDÕs averaged IRF datasets:
G
G ED_TM_irf_mean+orig ED_HM_irf_mean+orig
G ED_TP_irf_mean+orig ED_HP_irf_mean+orig
G
GEach voxel will now contain a single number (i.e., the mean percent signal change).  For example:
Created with The GIMPCreated with The GIMP
ED_HM_irf_mean+orig