Independent Component Analysis (canICA) Interpretation of negative values/ explained variance

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Dear Community,

How would you interpret the negative values (blue-ish) of components that were produced by an ICA or canICA?
What does the explained variance in specific has to do with positive and negative values within the very same component?

Thank you for considering. Much appreciated!

[bthirion]

I think I would interpret this as regions having some kind of anti-correlation.
I don’t see any relationship with explained variance.
HTH,
Bertrand