Hi everyone,
I am running a study which has two types of blocks (1 experimental and 1
control). For each of these blocks I have second-by-second measurements of
the same parametric variable. I was wondering whether it would be valid to
run a standard t-contrast [1 -1] to identify regions associated with the
parametric variable that are more active in the experimental blocks than
in the control blocks.
Is it OK to do this with parametric regressors?
Or, alternatively, could I use some sort of masking procedure to remove
brain regions associated with the parametric variable in the control
blocks when I examine the effects of the same parametric variable in the
experimental blocks?
Many Thanks,
Lorelei
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Lorelei Howard
Ph.D. Student
Institute of Behavioural Neuroscience
Cognitive, Perceptual and Brain Sciences Department
University College London
26 Bedford Way
WC1H 0AP
+44 (0)20 7679 8553
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