Hi FSL folks,
I have a question about the dual regression stage2 output files. I understand that the output maps indicate the strength of correlation between a given voxel and the timeseries obtained at stage1 from the input component map, but what exactly do the voxel values in the dr_stage2_ic0000x and in the dr_stage2_ic000x_Z files represent?
I'd also like to know if it would be methodologically sound to perform group comparisons using the dr_stage2_subject00000 file and subsequently use the significant clusters to obtain the correlation values from the Z-stat maps (rather than from the non-Z maps as those are not normally distributed) to perform correlations with behavioural measures outside FSL.
Many thanks in advance,
Carlos
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