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Hi - please see the TBSS manual - you should apply the GLM/correlation at the end using randomise. Steve. On 26 Mar 2012, at 10:17, SUBSCRIBE FSL Patricia Pires wrote: > Hello everyone! > > I was wondering if you could help me with this analysis to my FA images in the Glm. > When I do a two sample unpaired t-test analysis i included two EV's one for each group. If i want to include a covariate (e.g. age) i included a third EV, etc. > > I was wondering if there is any way to make correlations in the GLM. The way i am now correlating with FA data is extracting the average value of each image (fslmeants) and correlating this value with another feature (e.g. a score in a test) using SPSS. Is that way to correlate correct? or is there any better way to correlate maybe with glm in order to observe the image results of this correlation? > > Thank you! > > Patricia. > --------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------