Sorry, I'm still having a problem following what you are trying to do. You have a 3x3 functional design (3 levels of reward, 3 levels of risk), and you want to look for an interaction between reward and risk?
On 02/24/2016 12:10 PM, Afzal, Afsana wrote: > Hi Doug, > > Upon reviewing the repeated measures ANOVA tutorial on the Freesurfer > website I was able to revise the fsgd file (below) to what I now think > is more accurate. > > I'm treating each observation of a condition (risk-reward pairing) and > indicating that each of those observations belong to the same subject > (Subject1, Subject2, etc). > > GroupDescriptorFile 1 > Class Subject1 > Class Subject2 > Variables hRisk-vs-lRisk hRisk-vs-mRisk > Input Subject1-lRsk_lRwd Subject1 -1 0 > Input Subject1-lRsk_mRwd Subject1 -1 0 > Input Subject1-lRsk_hRwd Subject1 -10 > Input Subject1-mRsk_lRwd Subject1 0-1 > Input Subject1-mRsk_mRwd Subject1 0-1 > Input Subject1-mRsk_hRwd Subject1 0-1 > Input Subject1-hRsk_lRwd Subject1 11 > Input Subject1-hRsk_mRwd Subject1 11 > Input Subject1-hRsk_hRwd Subject1 11 > > Input Subject2-lRsk_lRwd Subject1 -10 > Input Subject2-lRsk_mRwd Subject1 -10 > Input Subject2-lRsk_hRwd Subject1 -10 > Input Subject2-mRsk_lRwd Subject1 0-1 > Input Subject2-mRsk_mRwd Subject1 0-1 > Input Subject2-mRsk_hRwd Subject1 0-1 > Input Subject2-hRsk_lRwd Subject1 11 > Input Subject2-hRsk_mRwd Subject1 11 > Input Subject2-hRsk_hRwd Subject1 11 > > > Please let me know if you think this design looks more correct given > the observations per subject. > > Thanks for your help, > Afsana > > ______________________________ > Afsana Afzal > Clinical Research Coordinator > Massachusetts General Hospital > Division of Neurotherapeutics > Department of Psychiatry: Neurosciences > 149 13th St, Room 2612 > Charlestown, MA 02129 > Phone: 617-643-5129 > Fax: 617-726-4078 > > ________________________________________ > From: freesurfer-boun...@nmr.mgh.harvard.edu > [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Afzal, Afsana > [aaf...@mgh.harvard.edu] > Sent: Monday, February 22, 2016 2:34 PM > To: Freesurfer support list > Subject: Re: [Freesurfer] [FreeSurfer] Repeated Measures ANOVA in FSFAST > > Hi, > > Sorry about the lack of clarification. > > Yes, it's a functional study. Each of the classes is a subject. I > basically want to compute the main effect of risk at the group level > (i.e. High Risk minus Low Risk) but there are multiple observations > per risk level since there are three different reward levels within > each risk level (low Reward, med Reward, high Reward). > I was thinking of setting up all the risk-reward conditions as active > (=1s) in the fsgd file and then subtracting the conditions using the > contrast matrices below to get the main effect of Risk. > > Please let me know if that makes a bit more sense. > > Thanks for your help, > Afsana > > ______________________________ > Afsana Afzal > Clinical Research Coordinator > Massachusetts General Hospital > Division of Neurotherapeutics > Department of Psychiatry: Neurosciences > 149 13th St, Room 2612 > Charlestown, MA 02129 > Phone: 617-643-5129 > Fax: 617-726-4078 > > ________________________________________ > From: freesurfer-boun...@nmr.mgh.harvard.edu > [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Douglas N Greve > [gr...@nmr.mgh.harvard.edu] > Sent: Monday, February 22, 2016 12:16 PM > To: freesurfer@nmr.mgh.harvard.edu > Subject: Re: [Freesurfer] [FreeSurfer] Repeated Measures ANOVA in FSFAST > > I'm having a hard time deciphering what you are doing. Is this a > functional study? What are the 5 classes? Why are there all 1s > regardless of risk or reward level? > > On 02/19/2016 10:52 AM, Afzal, Afsana wrote: > > Hi, > > > > I'm analyzing a decision making task with a 3x3 condition matrix: > > pairings of low, medium, high levels of risk with low, medium, high > > levels of reward. > > > > I've set up the following FSGD file to do a repeated > > measures/within-subject ANOVA: > > > > GroupDescriptorFile 1 > > Class hc001 > > Class hc002 > > Class hc003 > > Class hc004 > > Class hc005 > > Variables lRsk_lRwd lRsk_mRwd lRsk_hRwd mRsk_lRwd > > mRsk_mRwd mRsk_hRwd hRsk_lRwd hRsk_mRwd hRsk_hRwd > > Input hc001 hc001 1 1 1 1 1 1 > > 1 1 1 > > Input hc002 hc002 1 1 1 1 1 1 > > 1 1 1 > > Input hc003 hc003 1 1 1 1 1 1 > > 1 1 1 > > Input hc004 hc004 1 1 1 1 1 1 > > 1 1 1 > > Input hc005 hc005 1 1 1 1 1 1 > > 1 1 1 > > > > I've also created the following contrast matrices: > > > > Con1: Does difference between highRisk andLowRisk differ from 0? > > 0 0 0 0 0 -1 -1 -1 0 0 0 1 1 1 > > > > Con2: Does difference between highRisk andMedRisk differ from 0? > > 0 0 0 0 0 0 0 0 -1 -1 -1 1 1 1 > > > > Is this an appropriate way of setting up the ANOVA? > > > > Thanks for your help, > > > > Afsana > > ______________________________ > > *Afsana Afzal* > > Clinical Research Coordinator > > Massachusetts General Hospital > > Division of Neurotherapeutics > > Department of Psychiatry: Neurosciences > > 149 13th St, Room 2612 > > Charlestown, MA 02129 > > Phone: 617-643-5129 > > Fax: 617-726-4078 > > > > > > _______________________________________________ > > 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: https://gate.nmr.mgh.harvard.edu/filedrop2 > www.nmr.mgh.harvard.edu/facility/filedrop/index.html > Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > _______________________________________________ > 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: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ 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.
