"We found that in the post-test there was a higher proportion of participants (32%) who could solve type C problems following cathodal tDCS as hypothesised (X2 = 7.02, p = 0.030) than following anodal (5%) and sham (5%)"
it absolutely makes sense... doesn't it?
no just kidding ^^
i tried this electric stimulation thing many time in my earlier days
just by sticking my wet finger into a socket
i always felt more confused afterwards