Dear SPM-list,
we have a question regarding the contrast setup for the fmri statistic:
Our experiment has 3 Conditions: Rest, Stim1 and Stim2.
We build contrasts like this:
C1: -1 1 0 to see effects of Stim1 against Rest condition
C2: 1 -1 0 to see negative effects of Stim1 against Rest
C3: -1 0 1 to see effects of Stim2 against Rest condition
C4: 1 0 -1 to see negative effects of the above
C5: 0 1 -1 to see effects of Stim1 that can not be explained through
Stim2.
Now the question:
Does contrast 5 give me the areas activated by stimulus1 that are not
activated by stimulus2 ?
How can I see the negative effects corresponding to contrast5 ?
Thank you
Thomas Stephan
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Thomas Stephan Email: [log in to unmask]
Klinikum Grosshadern
Neurologisches Forschungshaus
Marchioninistr. 23 Fon: +49 089 / 7095-4809 *NEU*
81377 Muenchen Fax: +49 089 / 7095-4801 *NEU*
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