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Computational Intelligence and Neuroscience
Volume 2016, Article ID 6410718, 9 pages
http://dx.doi.org/10.1155/2016/6410718
Research Article

Stimulator Selection in SSVEP-Based Spatial Selective Attention Study

1School of Electronics and Information, Northwestern Polytechnical University, Xi’an, China
2School of Electronic Engineering and Computer Science, Technical University of Berlin, Berlin, Germany
3Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA
4AVIC Shenyang Aircraft Design & Research Institute, Shenyang, China

Received 3 July 2016; Revised 29 September 2016; Accepted 1 November 2016

Academic Editor: Saeid Sanei

Copyright © 2016 Songyun Xie et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Steady-State Visual Evoked Potentials (SSVEPs) are widely used in spatial selective attention. In this process the two kinds of visual simulators, Light Emitting Diode (LED) and Liquid Crystal Display (LCD), are commonly used to evoke SSVEP. In this paper, the differences of SSVEP caused by these two stimulators in the study of spatial selective attention were investigated. Results indicated that LED could stimulate strong SSVEP component on occipital lobe, and the frequency of evoked SSVEP had high precision and wide range as compared to LCD. Moreover a significant difference between noticed and unnoticed frequencies in spectrum was observed whereas in LCD mode this difference was limited and selectable frequencies were also limited. Our experimental finding suggested that average classification accuracies among all the test subjects in our experiments were 0.938 and 0.853 in LED and LCD mode, respectively. These results indicate that LED simulator is appropriate for evoking the SSVEP for the study of spatial selective attention.