“…In the previous literature, control conditions are quite variable in NF studies, not only aiming at the link between brain activity and feedback but also varying the task or the procedure 22 . For example, in clinical studies where NFT aimed at reducing behavioral symptoms or psychological processes associated with various disorders (anxiety [14][15][16] , depression 10,11,23 , addiction [24][25][26][27] , attention deficit [5][6][7][8][9]28,29 ), NF performance was typically compared with active control groups, such as cognitive therapy, mental exercise, and treatment-as-usual 22 . Thus, the self-reported or clinical benefits of NFT may be related to an ensemble of specific and non-specific mechanisms, including psychosocial influences [30][31][32] , cognitive and attentional/motivational factors 33 , test-retest improvement, as well as spontaneous clinical improvement or cognitive development 17 , and the learning context, contributing to the ongoing debate about NF efficacy 15,34 .…”