Kelly, S. P., Lalor, E., Finucane, C., and 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: [in] proceedings of the 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society 1-5 Sept. 2004, 2, (7), IEEE, 2004, pp4725- 472
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.
Please note: There is a known bug in some browsers that causes an
error when a user tries to view large pdf file within the browser window.
If you receive the message "The file is damaged and could not be
repaired", please try one of the solutions linked below based on the
browser you are using.
Items in TARA are protected by copyright, with all rights reserved, unless otherwise indicated.