On 10/17/2012 04:46 PM, Caroline Jiang wrote: > > Hi, > > I’m trying to set up my fsgd file for repeated measures ANOVA with two > groups and 6 time points (0, 1, 2, 3, 4, 5) by following the example > from here: http://surfer.nmr.mgh.harvard.edu/fswiki/RepeatedMeasuresAnova > > Does this look correct for the fsgd file? Subject 2 is missing time > points 2 and 5. > > GroupDescriptorFile 1 > > > > > > > > > > Title > > > > RepeatedMeasures > > > > > > > > > Class > > > > Group1 > > > > > > > > > Class > > > > Group2 > > > > > > > > > Variables > > > > > > TP0-vs-TP1 > > > > TP0-vs-TP2 > > > > TP0-vs-TP3 > > > > TP0-vs-TP4 > > > > TP0-vs-TP5 > > Input > > > > subject1_tp0 > > > > Group1 > > > > 1 > > > > 1 > > > > 1 > > > > 1 > > > > 1 > > Input > > > > subject1_tp1 > > > > Group1 > > > > -1 > > > > 0 > > > > 0 > > > > 0 > > > > 0 > > Input > > > > subject1_tp2 > > > > Group1 > > > > 0 > > > > -1 > > > > 0 > > > > 0 > > > > 0 > > Input > > > > subject1_tp3 > > > > Group1 > > > > 0 > > > > 0 > > > > -1 > > > > 0 > > > > 0 > > Input > > > > subject1_tp4 > > > > Group1 > > > > 0 > > > > 0 > > > > 0 > > > > -1 > > > > 0 > > Input > > > > subject1_tp5 > > > > Group1 > > > > 0 > > > > 0 > > > > 0 > > > > 0 > > > > -1 > > Input > > > > subject2_tp0 > > > > Group1 > > > > 1 > > > > 1 > > > > 1 > > > > 1 > > > > 1 > > Input > > > > subject2_tp1 > > > > Group1 > > > > -1 > > > > 0 > > > > 0 > > > > 0 > > > > 0 > > Input > > > > subject2_tp3 > > > > Group1 > > > > 0 > > > > 0 > > > > -1 > > > > 0 > > > > 0 > > Input > > > > subject2_tp4 > > > > Group1 > > > > 0 > > > > 0 > > > > 0 > > > > -1 > > > > 0 > > Input > > > > subject3_tp0 > > > > Group2 > > > > 1 > > > > 1 > > > > 1 > > > > 1 > > > > 1 > > Input > > > > subject3_tp1 > > > > Group2 > > > > -1 > > > > 0 > > > > 0 > > > > 0 > > > > 0 > > Input > > > > subject3_tp2 > > > > Group2 > > > > 0 > > > > -1 > > > > 0 > > > > 0 > > > > 0 > > Input > > > > subject3_tp3 > > > > Group2 > > > > 0 > > > > 0 > > > > -1 > > > > 0 > > > > 0 > > Input > > > > subject3_tp4 > > > > Group2 > > > > 0 > > > > 0 > > > > 0 > > > > -1 > > > > 0 > > Input > > > > subject3_tp5 > > > > Group2 > > > > 0 > > > > 0 > > > > 0 > > > > 0 > > > > -1 > > I’m interested in the overall group effect [1 -1 0 0 0 0 0 ], overall > time effect, and group-x-time interaction. > > Is this the correct contrast for the overall time effect? > > 0 0 1 0 0 0 0 > > 0 0 0 1 0 0 0 > > 0 0 0 0 1 0 0 > > 0 0 0 0 0 1 0 > > 0 0 0 0 0 0 1 > yes > > What would be the contrast for group-x-time interaction? > If you want to do a group-x-time, then you need to set up a different fsgd file where you would have 8 variables, the 4 you have above each one of them for each group. If the subject does not belong to the group, then set the columns for that group to 0. And the contrast matrix would then be
0 0 1 0 0 0 0 -1 0 0 0 0 0 0 0 1 0 0 0 0 -1 0 0 0 0 0 0 0 1 0 0 0 0 -1 0 0 0 0 0 0 0 1 0 ... 0 0 0 0 0 0 1 ... doug > Thanks! > > Caroline > > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
