Dear SPMers,
I was wondering about the weight contrasts in first level...
I'v seen that in several papers the rule is perform a [1 -1] (condition 1 > condition) and later use this contrasts in a second level analysis.
But, my question relay if I can perform contrasts with a weight of [1 0] to identify voxels whose activation increased in one condition and then use this img contrasts in second level.
Is this correct?
Thank you in advance!
Cheers!
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