title: Stimulator Selection in SSVEP-Based Spatial Selective Attention Study.
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.
authors.affiliation: School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China.
authors.forename: Songyun
authors.identifier: 0000-0002-8774-7291
authors.initials: S
authors.lastname: Xie
authors.affiliation: School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China.
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.affiliation: School of Electronic Engineering and Computer Science, Technical University of Berlin, Berlin, Germany.
authors.forename: Klaus
authors.identifier: 0000-0002-0471-8170
authors.initials: K
authors.lastname: Obermayer
authors.affiliation: Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA.
authors.forename: Fangshi
authors.initials: F
authors.lastname: Zhu
authors.affiliation: AVIC Shenyang Aircraft Design & Research Institute, Shenyang, China.
authors.forename: Linan
authors.initials: L
authors.lastname: Wang
authors.affiliation: School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China.
authors.forename: Xinzhou
authors.initials: X
authors.lastname: Xie
authors.affiliation: School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D001288:Attention / Q000502:physiology*; D001931:Brain Mapping; D002755:Choice Behavior / Q000502:physiology*; D004569:Electroencephalography; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D005583:Fourier Analysis; D006801:Humans; D008297:Male; D010775:Photic Stimulation; D013028:Space Perception / Q000502:physiology*; D013997:Time Factors; D014794:Visual Fields; D055815:Young Adult