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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/19520

Title: A comparison of covert and overt attention as a control option in a steady-state visual evoked potential-based brain computer interface
Other Titles: Annual International Conference of the IEEE Engineering in Medicine and Biology Society: 26th: 2004
Author: LALOR, EDMUND
REILLY, RICHARD
Author's Homepage: http://people.tcd.ie/reillyri
Keywords: Brain
Computer Interface
EEG
Spatial selective attention
Steady-State Visual Evoked Potential
Issue Date: 2004
Citation: Kelly S.P., Lalor E, Finucane C., Reilly R.B., A comparison of covert and overt attention as a control option in a steady-state visual evoked potential-based brain computer interface: 26th: September 1-5, 2004
Abstract: EEG data were recorded from occipital scalp regions of subjects who attended to an alternating checkerboard stimulus in one visual field while ignoring a similar stimulus of a different frequency in the opposite visual field. Classification of left/right spatial attention is attempted by extracting Steady-State Visual Evoked Potentials (SSVEPs) elicited by the stimuli to assess the potential use of such a spatial selective attention paradigm in a Brain Computer Interface (BCI). Experimental setup and analysis procedure in a previous study in which eye movement is permitted are replicated in order to quantify differences in classification performance using overt and covert attention. Four variations of the basic paradigm, involving both feedback and addition of extra mental load, are studied for comparison. The average accuracy is found to be reduced by ~20% in the switch from overt to covert attention when no other specifications of the task are changed.
Description: PUBLISHED
URI: http://ieeexplore.ieee.org/iel5/9639/30463/01404308.pdf?arnumber=1404308
http://hdl.handle.net/2262/19520
Appears in Collections:Administrative Staff Authors (Scholarly Publications)

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