Quantification and reduction of visual load during BCI operation

Multi-Session Influence of Two Modalities of Feedback and Their Order of Presentation on MI-BCI User Training

“…Initial research on somatosensory feedback focused on tactile feedback through the use of vibrotactile motors. Compared to simple visual feedback, continuous vibrotactile haptic feedback provided on the neck, the neck and forearms or on the palm of the hands, does seem to be just as efficient in terms of neurophysiological response and BCI performances [16][17][18]. Comments from participants indicate that tactile feedback feels more natural [16].…”

“…Even though the performances post training with visual and vibrotactile feedback seem similar, haptic feedback could interfere with the motor imagery task, especially when providing negative feedback during misclassification [16]. The real benefit from tactile feedback compared to visual feedback seems to arise when the visual attention or cognitive load is high [16,17,19].…”

“…The multi-session influence of vibrotactile feedback remains unknown. To our knowledge, all previous studies using vibrotactile feedback only assessed its impact during a single user training session [16][17][18][19][22][23][24]. Such multi-session influence could be impacted by the fact that negative vibrotactile feedback, that is, vibrations indicating to the user that there is a mismatch between the instructed task and the recognized task by the system, could interfere with the motor imagery task [16].…”

Continuous Tactile Feedback for Motor-Imagery Based Brain-Computer Interaction in a Multitasking Context

“…However, their set up is different from ours: feedback is provided on the neck (as opposed to the palm of the hand), only updated every 2 seconds (as opposed to every 0.250s) and more importantly, the feedback has not been tested in a BCI control context. In [9], a comparison between visual and tactile feedback was proposed, and the findings showed that they are associated with equivalent performances in a BCI context. In [15], visual and tactile feedback were compared in the context of a visual attention task performed using a BCI.…”

“…To date, most MI-BCI studies involved visual feedback to inform the user about the MI task recognised by the system. Yet, this visual feedback is difficult to assimilate when integrated with the visual layout of the primary interactive application that it supports [9]. Indeed, the visual channel is often overtaxed in interactive environments [15].…”