Hi,
On 20 May 2009, at 15:22, Antonia Lundquist wrote:
> Hi FSL,
>
> I am running the FEAT post-stats function "Cluster thresholding" and
> am wondering what the p-value setting stands for here.
> *Is it the probability of getting a specific cluster, so that every
> voxel in a certain cluster has one and only p-value (while still
> having different z-values)?
Yes - that's right - for more details on cluster thresholding please
see the manual
http://www.fmrib.ox.ac.uk/fsl/feat5/detail.html#poststats
and also the various web pages on the Cambridge Imagers website.
Cheers.
>
> *What is the relation, if any, of the p-threshold (as set in the
> GUI) to the z-threshold set (defaults are z-threshold: 2.3 and
> cluster p-threshold: 0.05)?
>
> *Also, after the analysis, how is the p-value of a cluster related
> to the max z-value of the most active voxel of a specific cluster?
>
>
> Thanks you for your help!
>
> Antonia
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