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Dear list members,
Having computed a voxelwise regression in SPM between BOLD and a behavioural
measure in 2 groups, I now want to formally compare the regression slopes
between the groups. Is the best way of doing this to extract parameter
estimates from a given cluster in both groups, and compare using Fisher's Z
test in SPSS, or is there a way of doing this within SPM? I've also heard of
this being done (in SPSS) using a Wald test, and wondered if anyone was
aware of whether this is appropriate?
Many thanks for any suggestions,
Phil Corlett
Research Associate
University of Cambridge Department of Psychiatry
Brain Mapping Unit
Downing Site
Downing Street
Cambridge
CB2 3EB
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