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Hi You mean when you ran the group-ICA? No, the thresholding of those maps does not affect what happens in the dual-regression. Steve. On 30 Apr 2013, at 09:20, Helen Sawaya <[log in to unmask]> wrote: > Thank you Steve, > > Might the lack of voxels above 0.95 have anything to do with specifying a stringent threshold IC maps value in MELODIC post-stats (0.99 instead of 0.5)? > > Thanks > Helen > > From: FSL - FMRIB's Software Library [[log in to unmask]] On Behalf Of Stephen Smith [[log in to unmask]] > Sent: Tuesday, April 30, 2013 11:12 AM > To: [log in to unmask] > Subject: Re: [FSL] tfce clarification > > Hi > > On 30 Apr 2013, at 09:02, Helen Sawaya <[log in to unmask]> wrote: > >> Dear experts, >> >> I have a small question regarding the use of tfce in randomise for group comparison. The ..tfce_corrp_tstat.. output represents the active voxels after extent and height parameter specification and correction for multiple comparisons. But looking at individual voxel intensities in fslview, do they need to reach 0.95 to say that we are looking at active voxels at p<.05 after correction for multiple comparisons? > > Yes > >> Can we take these images as is or do we need to use fslmaths to specify the voxels above 0.95? > > It's the same thing - the corrp image contains 1-corrected_p_values. > > Steve. > > >> >> Thank you! >> Helen > > > --------------------------------------------------------------------------- > Stephen M. Smith, Professor of Biomedical Engineering > Associate Director, Oxford University FMRIB Centre > > FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK > +44 (0) 1865 222726 (fax 222717) > [log in to unmask] http://www.fmrib.ox.ac.uk/~steve > --------------------------------------------------------------------------- > > > > --------------------------------------------------------------------------- Stephen M. Smith, Professor of Biomedical Engineering Associate Director, Oxford University FMRIB Centre FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 222726 (fax 222717) [log in to unmask] http://www.fmrib.ox.ac.uk/~steve ---------------------------------------------------------------------------