Title :
The Effect of the Viewing Distance of Stimulus on SSVEP Response for Use in Brain-Computer Interfaces
Author :
Chi-Hsu Wu ; Lakany, Heba
Author_Institution :
Dept. of Biomed. Eng., Univ. of Strathclyde, Glasgow, UK
Abstract :
Most visual stimulators used in steady state visual evoked potential (SSVEP) based brain-computer interface (BCI) to elicit SSVEP response are set close to the BCI system limiting the portability and the applications of the system. Our aim is to develop a portable SSVEP based BCI adaptable to the change of the viewing distance of the stimulator which will allow users to operate the BCI without being restricted to a particular area. This study (1) investigates the impact of the distance between the user and the visual stimulator on the SSVEP response and (2) develops a portable visual stimulator that would adapt to change of distance. The finding suggests that a distance adaptable SSVEP based BCI is achievable by changing the intensity of visual stimulator to correspond to the change of the viewing distance. It is hoped that this work can help SSVEP BCI design and broaden its potential applications and users.
Keywords :
brain-computer interfaces; electroencephalography; medical signal processing; visual evoked potentials; BCI system; EEG; SSVEP response; brain-computer interfaces; distance adaptable SSVEP; electroencephalography; portable SSVEP; portable visual stimulator; steady state visual evoked potential; stimulus viewing distance; Analysis of variance; Correlation; Electroencephalography; Light emitting diodes; Time-domain analysis; Time-frequency analysis; Visualization; Brain-computer interface (BCI); Electroencephalography (EEG); Steady state visual evoked potential (SSVEP);
Conference_Titel :
Systems, Man, and Cybernetics (SMC), 2013 IEEE International Conference on
Conference_Location :
Manchester
DOI :
10.1109/SMC.2013.317
