[Freesurfer] [FreeSurfer] Repeated Measures ANOVA in FSFAST

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 and LowRisk differ from 0? 0 0 0 0 0 -1 -1 -1 0 0 0 1 1 1

Con2: Does difference between highRisk and MedRisk 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