Effect of Threshold Setting on Neurofeedback Training

Abstract

This study aimed to confirm the effect of threshold setting on the performance of neurofeedback training. The experimental conditions used to confirm the effect of the different threshold settings on the degree of electroencephalographic (EEG) changes in the initial training conditions were unfamiliar to neurofeedback. Rewards were presented in low , medium , and high frequency groups according to the different threshold settings. The sensory-motor rhythm (SMR; 12–15 Hz) neurofeedback protocol was performed for all groups. We looked at whether the posttraining brain wave increases were significant in each group compared to the brain waves during training. The SMR protocol was performed in a single session and consisted of four blocks totaling 10 minutes. EEG data was collected before training as a baseline, during training, and posttraining. The results of the group analysis showed that the mean SMR value of the posterior EEG in the high frequency group was significantly higher than the SMR value in the first EEG block. The threshold settings affected learning in neurofeedback training. It was found that initially setting the threshold value for easy compensation was more effective than the setting for hard compensation.