[FieldTrip] Performing time-frequency statistical tests on regional source data

[jan-mathijs schoffelen]

Hi Emilio,

Using ft_freqstatistics is very possible. Indeed you will not be able to use clustering for multiple comparison correction. In fact, having reduced the number of comparisons to 8 already almost gets rid of the multiple comparison problem. You can use a nonparametric permutation test without a cluster-based test statistic, and do a bonferroni correction on the p-values.

Best,
Jan-Mathijs


On Feb 26, 2013, at 9:26 PM, Emilio Valadez wrote:

> Dear FieldTrip users,
> 
> I have an EEG dataset that was reduced to 8 regional sources with BESA and then exported for FieldTrip analysis. I want to perform a statistical test on the regional sources' time-frequency data, comparing two experimental conditions, but I don't know whether it would be appropriate to use ft_freqstatistics (because I have regional sources instead of a complete sensor layout - making cluster formation problematic) or ft_sourcestatistics. Can you suggest a method for performing a statistical test in this situation? Thanks in advance for your help.
> 
> Best,
> Emilio Valadez
> 
> 
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Jan-Mathijs Schoffelen, MD PhD 

Donders Institute for Brain, Cognition and Behaviour, 
Centre for Cognitive Neuroimaging,
Radboud University Nijmegen, The Netherlands

Max Planck Institute for Psycholinguistics,
Nijmegen, The Netherlands

J.Schoffelen at donders.ru.nl
Telephone: +31-24-3614793

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