Does tactile feedback enhance single-trial detection of error-related eeg potentials?

摘要

Error-related electroencephalographic (EEG) potentials (ErrPs) have been explored to improve the reliability of modern Brain-Computer Interfaces (BCIs), thanks to the information they carry about user awareness of erroneous responses. ErrPs detection on a single-trial basis has been successfully demonstrated, and proved to effectively enhance human-computer interaction and BCI performance. Previous studies tested ErrPs elicited by providing either visual or tactile feedback, showing similar results for all feedback modalities. In the present work, we tested: 1) whether the addition of tactile feedback can improve the detection of ErrP, when used in combination and not alternatively to visual feedback; 2) whether a mismatch between the two different sensory channels can enhance ErrP detection. Results on a study carried out on 12 healthy subjects show that the addition of tactile stimuli significantly affects single-trial ErrP recognition (AUC increment of 4.3%) without significant difference in case of concordant or discordant visual and tactile stimuli.