Hello SPMers,
I have one group of subjects either male or female, each with a pych. score.
I would like to show where activation correlates, both positively and
negatively with the psych score after the effects of gender (or another
psych. score) have been removed. I'm not sure if I would use a multiple
regression model since the ancova model only allows one covariate in
spm99.
A simple question as well : in a regression model, in my contrast a 1
means a positive correlation, a -1 means a negative correlation , does
'0' mean the effects of the covariate are removed?
Any help would be greatly appreciated.
Thanks for your time,
Maria Densmore
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