Hi Francois,
I'm writing clarification to our last post. Termu will send you more detailed screen captures tomorrow (if needed).
This issue was related to the example file that termu send you. As you mentioned:
That is what we expected. However, our problem is that we do not get any negative values visible to the connectivity chart. We have checked that colormap range is [min,max], we have tried to lower the critical p value from 0.05 to 0.5 and we have changed the multiple comparison correction to uncorrected. We have checked all the frequency bands, but no negative scores can be found. Do we miss something obvious?
In addition, as you wrote:
We understand, that it could be possible that we just do not have any negative values present in our data. What concerns us is, that when we move the intensity slider, let's say from -4 to -8, we see new lines appearing to connectivity chart. However, these lines have positive score values. Should it be so, that these new lines should have negative scores in the range from -8 to -4?
Is this coherence connectivity score always positive? This would somehow explain what we see. But why the unit under the colorbar and the slider is still the connectivity score even after the t-test is done? In examples of statistical test on sources, the colorbar unit is the t-value. Should this be the case also with connectivity charts after statistical tests?
So you mean, that we should keep the slider bar always on the most left side (at the minimum score) of the slider to visualize all statistically meaningful connections?
Thank you in advance! Sorry for the basic level of these questions.