Hi all,
I apologies in advance this is a long one….
I have a 2X2X2 repeated measures ANOVA design, which I am trying to create the proper matrices for, both in 1st level and in group level, I would be very grateful for any help I can get on this.
The conditions are Scenario (Pain vs Neutral), regulation strategy (Reappraisal vs Empathic Watch) and facial expression (Happy vs Painful). I’m not interested at all in the all the possible contrasts.
What I have done so far was to run the first level with the following matrix
EV1 EV2 EV3 EV4 EV5 EV6 EV7 EV8
PrH 1 0 0 0 0 0 0 0
PrP 0 1 0 0 0 0 0 0
PewP 0 0 1 0 0 0 0 0
PewH 0 0 0 1 0 0 0 0
NrH 0 0 0 0 1 0 0 0
NrP 0 0 0 0 0 1 0 0
NewH 0 0 0 0 0 0 1 0
NewP 0 0 0 0 0 0 0 1
PewP-PewH 0 0 -1 1 0 0 0 0
PrP-PrH -1 1 0 0 0 0 0 0
(PewP-)-(PrP-PrH) 1 -1 -1 1 0 0 0 0
NewP-NewH 0 0 0 0 0 0 -1 1
(PewP-)-(NewP-NewH) 0 0 -1 1 0 0 1 -1
I’m not sure how to set up the group level matrix, and the contrasts (especially the use of different weights that I saw often in Anderson’s replays). And finally should I use F tests (I’m not sure how this function of FSL is used)?
Thank you,
Navot
|