plot_topo() method for glm results

Hi there,
I performed a glm on my fNIRS data with mne_nirs.statistics.run_glm(raw_haemo, design_matrix)
And I am now exploring my results. But there is something I can’t make sense of: when I plot the topomap of my glm object: glm_est.plot_topo(), I get the same kind of topoplot as in the tutorial. However, in the tutorial as in my data, I don’t understand why the results displayed are “Haemoglobin (uM)” results, ranging from 0 to 1 like in the following example:
Capture d’écran du 2023-03-09 15-22-58

I would have expected Theta results to be displayed (ranging from -infinite to +infinite). Or maybe there is a data transformation that I’m not aware of ?
Thank you so much in advance :slight_smile:
Jérémie