On 2/26/2021 9:41 AM, Agurne Sampedro Calvete wrote:

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Dear Douglas, 

And is there a recommended way to compute a z value from the cluster p-value?

You can use a p-to-z conversion; I'/m not sure it means much though

With voxel-wise measure of z value, do you mean a z value of a particular voxel, for instance, the voxel with the maximum p value in a cluster?

It could be that or the average. I don't know what you are trying to do here so I can't be much help

Thank you very much. 

Regards,

Agurne 

 

 

El vie, 26 feb 2021 a las 14:38, Douglas N. Greve (<dgreve@mgh.harvard.edu>) escribió:

There is no z value for the cluster itself, but you could take the cluster p-value and use it to compute a z value. Or do you want a voxel-wise measure of z value?

On 2/24/2021 4:00 AM, Agurne Sampedro Calvete wrote:

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Dear Freesurfer experts, 

 In relation to the previous question, could I obtain a Z value of the significant cluster obtained by opening in freeview the z.mgh and place the cursor on the point with the highest value? Is there another way to obtain a Z value or alternatively, a t-value?

Thank you very much in advance, 

Best regards, 

Agurne 

El mar, 23 feb 2021 a las 13:25, Agurne Sampedro Calvete (<a.sampedro@deusto.es>) escribió:

Dear Freesurfer experts, 

I am doing a longitudinal repeated measures analysis and after correcting for multiple comparisons with Z Monte Carlo simulation (with the "mri_glmfit-sim ... --cache 3 ..." command), I obtained a significant cluster for my experimental group (pre-post). 

In order to obtain the information for displaying the results in the paper, I am looking at the cluster summary table. I have seen that some papers include the t value in addition to the p value, cluster size and coordinates, but how can I obtain the t value? Does it appear in the cluster summary table or elsewhere?

Thank you very much in advance,

Kind regards, 

Agurne 

 

 

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