Journal Article


R B Reilly
C Finucane
E Lalor
S P Kelly



classification potential based experimental analysis steady state brain computer interface movement evoked potentials visual steady state visual evoked potential

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 approximately 20% in the switch from overt to covert attention when no other specifications of the task are changed.
Collections Ireland -> University College Dublin -> PubMed

Full list of authors on original publication

R B Reilly, C Finucane, E Lalor, S P Kelly

Experts in our system

Richard Reilly
Trinity College Dublin
Total Publications: 185
Edmund C Lalor
Trinity College Dublin
Total Publications: 54
Simon P Kelly
University College Dublin
Total Publications: 42