[FieldTrip] Rank deficiency in ft_regressconfound: worrisome?

[Vitória Magalhães Piai]

Hi all, and maybe more specifically Arjen,

I want to compare effects on 3 different tasks on the participant level. 
So I'm giving ft_regressconfound a try, following the tutorial, 'cause I 
thought that should improve the comparability of each participant's 
topographies across tasks.

I'm just wondering how much I should worry about the warning of "Rank 
deficient" when running ft_regressconfound. Any thoughts on it and on 
what the consequences are of having a rank deficient model for the type 
of comparison I'm planning to make?

Thanks a lot,
groetjes, Vitória

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