Hi,
yes, it is necessary to report results corrected for multiple comparisons, especially when you're performing some voxel-wise analysis such as VBM, when *wrong* rejections of the null hypothesis are more likely to occur...
Cheers,
Gwenaelle
--- En date de : Lun 23.11.09, MRI student <[log in to unmask]> a écrit :
> De: MRI student <[log in to unmask]>
> Objet: Re: [FSL] uncorrected p-value in TFCE
> À: [log in to unmask]
> Date: Lundi 23 Novembre 2009, 12h54
> Matthew,
> To follow up on this
> question:
> For a VBM analysis, is it
> necessary to report results from the corrected p-value tstat
> images?
>
> Would it be possible to
> report VBM results from the tfce_p_tstat images?
> I appreciate your
> input.
>
> Thank you.Regards,N.
>
>
> -----Subject: Re:
> [FSL] uncorrected p-value in TFCE
> ------------------------
>
>
> From: Matthew Webster <[log in to unmask]>
> Date: Mon, Nov 23, 2009 at 3:52 AM
>
> To: [log in to unmask]
>
>
> Hi,
>
> The uncorrected p-values are purely voxelwise - they
> are calculated for each voxel using its individual
> distribution.
>
>
>
> Many Regards
>
>
>
> Matthew
>
>
>
>
>
>
> Hello FSL experts,
>
> My correspondence with Mark has made be curious about the
> following:
>
>
>
> How is the uncorrected p-value computed for the TFCE test
> statistic of
>
> 'randomise'?
>
>
>
> cheers,
>
> Mike H.
>
>
>
>
>
> --
>
> Michael Harms, Ph.D.
>
> --------------------------------------------------------------------
>
> Conte Center for the Neuroscience of Mental Disorders
>
> Washington University School of Medicine
>
> Department of Psychiatry, Box 8134
>
> Renard Hospital, Room 6615 Tel:
> 314-747-6173
>
> 660 South Euclid Ave. Fax:
> 314-747-2182
>
> St. Louis, MO 63110 Email: [log in to unmask]
>
> --------------------------------------------------------------------
>
>
>
>
>
>
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