Yes, 3 is p<.001, which is converted to a z before thresholding the map. 
Note that we are trying to push people to use permutation instead of MC.

On 07/09/2018 05:22 PM, Dincer, Aylin wrote:
>
>
> Hi FreeSurfer experts,
>
>
> I am trying to understand the Monte Carlo Z simulation in FreeSufer 
> (/mri_glmfit/-/sim/) and have a question about the vertex wise 
> /cluster forming threshold.
>
>
> In the simulation, a vertex wise threshold (ex. -cache 3 abs) is set 
> and the threshold is applied to a z map. Is the 3 threshold (p value 
> of 0.001) converted to a z score using the z table before it is 
> applied to the map?
>
>
> Thanks!
>
> Aylin
>
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