It is valid, yes - with randomise (unlike with GRF).
Cheers.


On 23 Dec 2011, at 14:55, Tony Goldstone wrote:

Dear FSLers
Using randomise to compare TBSS FA data between two unpaired groups what is the lowest acceptable t threshold to use in the -c option to then use FWE corrected P corrected comparison?
Is -c 1.5 acceptable?
Using the tfce --T2 option does not produce any significant clusters.
Many thanks and Happy Xmas

Dr Tony Goldstone
MRC Clinical Sciences Centre, Imperial College London, UK



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