“…The choice of the brain signals acquired and the features selected for feedback form essential steps in BCI development (Benitez-Andonegui et al, 2020 ; Rieke et al, 2020 ). BCIs may use electrical and magnetic signals acquired from Electroencephalography (EEG; Stojic and Chau, 2020 ; Gaur et al, 2021a , b ), Magnetoencephalography (MEG; Roy et al, 2020 ; Ovchinnikova et al, 2021 ; Rathee et al, 2021 ), Electrocorticography (ECoG; Luo, 2020 ; Zhang et al, 2020 ), or implanted electrodes, or hemodynamic signals acquired from functional Magnetic resonance Imaging (fMRI; Simon et al, 2020 ; Sorger and Goebel, 2020 ), or functional near-infrared spectroscopy (fNIRS; Almulla et al, 2020 ; Li et al, 2020 ; Nazeer et al, 2020 ; Shibu et al, 2020 ; Ghaffar et al, 2021 ).…”