help > Cluster-forming threshold for 1st l. analysis
Feb 3, 2016  12:02 PM | Johann Philipp Zöllner - Goethe University Frankfurt
Cluster-forming threshold for 1st l. analysis
Dear Conn-Pros,
 
 
when looking at the correlation coefficients in the Conn GUI (1st level), I get rather nice correlation maps with the arbitrary threshold of 0.25. But while these are nice, they are of course not reportable. When I perform the first level analysis, I get huge clusters in the p_corr and pFDR images. I *suppose* this has something to do with the cluster forming threshold that Conn uses to produce the corr images. So what I want to achieve is to adjust this threshold (I assume it is 0.001) for my 1st level 1-sample T-test(s). Alternatively, would it be correct to threshold the corr images using spm_imcalc like "i1<0.0001" (for example) to achieve the same effect?
 
I can provide code samples or images of my results if that is of any help!
 
Thanks in advance,
Johann Philipp

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TitleAuthorDate
Cluster-forming threshold for 1st l. analysis
Johann Philipp Zöllner Feb 3, 2016
Alfonso Nieto-Castanon Feb 4, 2016
Johann Philipp Zöllner Feb 11, 2016
Alfonso Nieto-Castanon Feb 12, 2016