Dear FSL experts,
I have a within-subject design,with three conditions, happy, fear and neutral emotional state. I want to do a F-test looking at the main effect of emotional state on BOLD data. For my GLM, I have 7 EVs, EV1 ( Happy state during period 1), EV2 ( Fear state during period 1), EV3 ( Neutral state during period 1), EV4 ( Happy state during period 2), EV5 (Fear during period 2), and EV 6 ( Neutral during period 2), and EV7 ( taking into account a secondary task performance). Period 1 and Period 2 were two different time periods I was interested in.
I was planning to do two F-tests(main effect of state during period 1 and 2 separately), as below,
Ev1 Ev2 Ev3 Ev4 Ev5 Ev6 Ev7 F1 F2
1 0 0 0 0 0 0 1
0 1 0 0 0 0 0 1
0 0 1 0 0 0 0 1
0 0 0 1 0 0 0 1
0 0 0 0 1 0 0 1
0 0 0 0 0 1 0 1
For F1, Ev4~Ev7 are irrelevant. What should I do with them? And the same for F2 ( Ev1~Ev3 and Ev7 are irrelevant). Any thoughts would be greatly appreciated. Thanks ahead of time.
