Effect of competing stimuli on SSVEP-based BCI

Ng, Kian B., Bradley, Andrew P. and Cunnington, Ross (2011). Effect of competing stimuli on SSVEP-based BCI. In: Proceedings 33rd Annual International Conference of the IEEE EMBS. Engineering in Medicine and Biology Society Annual International Conference of the IEEE EMBS, Boston, MA, United States, (6307-6310). 30 August - 3 September 2011. doi:10.1109/IEMBS.2011.6091556


Author Ng, Kian B.
Bradley, Andrew P.
Cunnington, Ross
Title of paper Effect of competing stimuli on SSVEP-based BCI
Language of Title eng
Conference name Engineering in Medicine and Biology Society Annual International Conference of the IEEE EMBS
Conference location Boston, MA, United States
Conference dates 30 August - 3 September 2011
Proceedings title Proceedings 33rd Annual International Conference of the IEEE EMBS   Check publisher's open access policy
Language of Proceedings Title eng
Journal name 2011 Annual International Conference of the Ieee Engineering in Medicine and Biology Society (embc)   Check publisher's open access policy
Series Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
Language of Journal Name eng
Place of Publication Piscataway, NJ, United States
Publisher IEEE
Publication Year 2011
Year available 2011
Sub-type Fully published paper
DOI 10.1109/IEMBS.2011.6091556
Open Access Status Not yet assessed
ISBN 9781424441211
ISSN 1557-170X
Start page 6307
End page 6310
Total pages 4
Language eng
Abstract/Summary Steady-state visual evoked potential (SSVEP)-based Brain-Computer Interface (BCI) works on the basis that an attended stimulus shows an enhanced visual evoked response. By examining EEG power at the frequency of the dominant evoked response, we are able to determine which stimulus the subject is attending. However, due to the limited processing capability of human visual system, when presented with multiple stimuli in the same visual field, the stimuli will compete for neural representations in the cortices. This study elucidates the effect of competing stimuli on SSVEP amplitudes by exploring the relationship between the number of stimuli and their inter-distance on the power spectra of attended stimuli. Results show that competing stimuli, when placed less than five degrees from the centre of the fovea, create a significant suppressive effect on the dominant frequency response. This result should guide how visual stimuli of SSVEP-based BCIs are spatially designed.
Subjects 1711 Signal Processing
2204 Biomedical Engineering
1707 Computer Vision and Pattern Recognition
2718 Health Informatics
Keyword Engineering, Biomedical
Engineering, Electrical & Electronic
Engineering
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Fri, 09 Mar 2012, 01:11:18 EST by Andrew Bradley on behalf of School of Information Technol and Elec Engineering