LLN, le 9/04/09
Dear Jeffrey,
Here is what I suggest:
(1) compute all your 1-level contrasts (e.g., [experimental-control])
for each subject individually,
(2) port the corresponding con_* files to 2-level analyses using:
- 1-sample t-tests with a contrast set at [1] for each group separately;
- 2-sample t-tests with your two groups and a contrast set at [1 -1]
(or [-1 1] depending on what you're looking at).
Hope this helps,
Mauro
>
>hello
>
>i am attempting to set up a fixed effects analysis in spm 2. i have
>two groups of 5 subjects. each subject has contrast images for a
>control task and for task correct trials. i want the fixed effects
>analysis to lead into a random effects analysis so i can compare the
>the two groups on these 2 variables. i am not sure how to set up
>these analyses. any help would be greatly appreciated.
>
>thank you for your time
>
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Mauro PESENTI
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Unite de Neurosciences Cognitives
Departement de Psychologie
Universite Catholique de Louvain
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