EN
The use of neurofeedback (NFB) in medical treatments, sport and art skills, rapidly increases. However, the mechanisms underlying NFB, its reliability and efficacy are still unclear. We reviewed 48 papers describing NFB training of adult, healthy subjects and performed our own, quantitative analysis on those which included control group (22). The analysis comprised: number of affected bands, group size, modality and intensity of training stimuli, number and position of electrodes. Correlation was measured with Kendall’s T between factors and training success in groups: ‘general’ (22) and ‘EEG’ (17). We found negative correlation for number of manipulated bands, and electrodes position at Cz. Positive correlations were found for number of electrodes. Our results suggests that: (1) NFB training targeted for many EEG bands is less efficient; (2) The detection of effects following NFB training requires multiple recording sites. Supported by Polish National Science Centre Grant UMO2012/07/B/NZ7/04383