Hi,
You can use whatever mask you want in randomise.
Using a 60% threshold is fine - these are arbitrary decisions, and you should explain the reasons for your choice.
You can generate this mask using fslmaths with the options "-thr 0.6 -bin".
All the best,
Mark
On 4 Sep 2013, at 02:07, Mark <[log in to unmask]> wrote:
> Hi,
>
> I used atlas mask as -m mask in randomise function.
> It seems that most researchers use atlas masks at 50% probability.
>
> But can I use 60%? If I use 60%, should I explain why?
>
> I guess this is arbitrary....
>
> Thanks a lot!
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