Dear Mark
Thanks for the response. Yes, I have also done this now and things make
sense.
Thanks for your clarification.
Liam.
On 2014-11-19 20:24, Mark Jenkinson wrote:
> Hi,
>
> I would strongly recommend against using a negative threshold in
> setting up the analysis, as the software is not designed to work like
> this. If you want to see results in the negative tail then you need
> to set up the opposite contrast and use a positive threshold with this
> negative contrast.
>
> Have a look at the FSL Course materials if you need more information.
>
> All the best,
> Mark
>
>
>> On 14 Nov 2014, at 17:06, L. Nestor <[log in to unmask]> wrote:
>>
>> I have run a one-sample cluster-based t-test in FSL FEAT. I have used
>> a voxel Z-statistic threshold of -2.3. I am having trouble
>> interpreting the result - I end up with just one huge cluster which I
>> can't seem to break up using the cluster command.
>>
>> I am also having trouble understanding how I display this in FSLVIEW.
>> What do I use as my minimum value - minus 2.3? This doesn't seem to
>> work. I have to use a minimum of 0 and a max of -2.3 to see the
>> deactivation map. Is this correct?
>>
>> Thank you,
>>
>> Liam.
--
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Liam J Nestor PhD
MRC Behavioural and Clinical Neuroscience Institute,
Department of Psychiatry,
University of Cambridge,
Herchel Smith Building,
Robinson Way,
Cambridge CB2 0SZ,
United Kingdom
E-mail: [log in to unmask]
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