Type

Conference Proceedings

Authors

Richard Reilly
Edmund Lalor

Subjects

Psychiatry

Topics
experimental analysis evoked potentials visual brain brain computer interface steady state visual evoked potential spatial selective attention brain brain computer interface computer interface eeg classification potential based

A comparison of covert and overt attention as a control option in a steady-state visual evoked potential-based brain computer interface (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.
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Full list of authors on original publication

Richard Reilly, Edmund Lalor

Experts in our system

1
Richard Reilly
Trinity College Dublin
Total Publications: 183
 
2
Edmund C Lalor
Trinity College Dublin
Total Publications: 52