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Affective Stimuli for an Auditory P300 Brain-Computer Interface.

Akinari Onishi1,2, Kouji Takano1, Toshihiro Kawase1,3

  • 1Systems Neuroscience Section, Department of Rehabilitation for Brain Function, Research Institute of National Rehabilitation Center for Persons with DisabilitiesTokorozawa, Japan.

Frontiers in Neuroscience
|October 7, 2017
PubMed
Summary

Positive affective auditory stimuli significantly enhance brain-computer interface (BCI) accuracy for communication. This finding suggests affective sounds can improve BCI systems for individuals with paralysis.

Keywords:
BCIBMIEEGP300affective stimulus

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Area of Science:

  • Neuroscience
  • Human-Computer Interaction
  • Affective Computing

Background:

  • Brain-computer interfaces (BCIs) offer communication pathways for individuals with severe paralysis.
  • Gaze-independent BCIs are crucial for users with limited motor control.
  • Affective auditory stimuli have not been extensively explored in P300 BCI paradigms.

Purpose of the Study:

  • To investigate the impact of affective auditory stimuli on the performance of a P300 BCI.
  • To compare the effectiveness of positive and negative affective sounds on BCI accuracy.
  • To assess the correlation between affective states and BCI performance.

Main Methods:

  • Utilized a P300 BCI with 15 able-bodied participants.
  • Employed positive (meowing cat) and negative (screaming cat) affective auditory stimuli, along with permuted versions.
  • Collected electroencephalography (EEG) data and measured affective feelings using a visual analog scale (VAS).

Main Results:

  • Positive affective stimuli (PA) yielded significantly higher classification accuracy (84.7%) and VAS scores (58.5) compared to permuted PA (67.3%, -12.1).
  • Negative affective stimuli (NA) showed no significant difference in accuracy (77.3%) or VAS scores (-50.0) between original and permuted versions (-39.2, 76.0%).
  • An individual with Amyotrophic Lateral Sclerosis (ALS) achieved 90% online classification accuracy.

Conclusions:

  • Positive affective auditory stimuli demonstrably improve P300 BCI accuracy.
  • Affective feelings evoked by stimuli correlate with enhanced BCI performance.
  • Affective auditory stimuli show promise for developing practical auditory BCI systems for individuals with disabilities.