Hi,
What did your full design look like - was it just the age regressor? Did you run randomise with the -D option when de-meaning age?
Many Regards
Matthew
> Hello,
> we are currently running a study on cognitive aging, part of the study concerned an analysis of the effect of age on gray matter. To achieve it we are using FSL-VBM and we did receive several advice on how to enter age is the analysis:
> solution 1: convert age between 0 and 1
> solution 2: real age
> solution 3: de-mean age
> We run the three kind of analysis and obtain different results. So we are asking ourself now which method is the most robust and why ? Can someone help us ?
> Thank's in advance
> Christophe
>
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