Finding the Best Waveform for Brain-Computer Interfaces
Author Information
Author(s): Teng Fei, Chen Yixin, Choong Aik Min, Gustafson Scott, Reichley Christopher, Lawhead Pamela, Waddell Dwight
Primary Institution: University of Mississippi
Hypothesis
Are the harmonics in the SSVEP elicited by the fundamental stimulating frequency or by the artifacts of the stimuli?
Conclusion
Square waves with a 50% duty cycle have a significantly higher accuracy in eliciting SSVEP compared to other stimuli.
Supporting Evidence
- Square waves with a 50% duty cycle had an accuracy of 94.7%.
- Triangle waves had an accuracy of 81.0%.
- Sine waves had an accuracy of 70.4%.
- The success rates for eliciting 2f components were 56.2% for square waves.
- The success rates for eliciting 3f components were 48.0% for square waves.
Takeaway
This study looked at different types of waveforms to see which one helps the brain respond better to visual signals. They found that square waves work best.
Methodology
The study compared SSVEP responses to square, triangle, and sine wave stimuli using EEG recordings from five subjects.
Limitations
The study was limited to a small sample size and specific frequency ranges.
Participant Demographics
Five subjects participated in the experiments.
Statistical Information
P-Value
0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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