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Hello FSL experts: Thanks for the previous answer :-) Regarding ICA and dual regression: 1) regarding the output of dual_regression, I would really appreciate very much if somebody could explain to me what exactly means and what are the difference between these images: a: dr_stage3_ic0000_tfce_corrp_tstat1.nii.gz b: dr_stage3_ic0000_tfce_p_tstat1.nii.gz c: dr_stage3_ic0000_tstat1.nii.gz 2) I have been researching the archives but I still have this question: What is better that you choose the number the components or to allow FSL to choose the numbers of them? if the former is better How do you choose a good number, what formula you need to apply? 3) BTW: I know what means "tfce" but What does means "corrp" Thank you very much in advance Lorena Jimenez Castro, MD Postdoc Fellow