Description
Paper
Link: https://www.pnas.org/content/pnas/93/10/4770.full.pdf
Year: 1996
Summary
presented user 2 stimuli, with attention, SSVEP extraction is pausable
Methods
8.6 and 12 hz presented, subjects maintain fixation, arrow (left or right) appear to instruct user to attend.
Results
The SSVEP was found to be strongly modulated by spatial selective attention, being substantially enlarged in response to a flickering stimulus at an attended versus an unattended location.
The present findings indicate that the allocation of attention between two steadily flickering stimulus locations is reflected in the relative amplitudes of frequency-specific SSVEPs elicited by each source. This observation suggests that SSVEPs may be used to advantage in further studies of visual attention to continuously presented stimuli, which may involve sensory selection mechanisms different from those engaged during attention to transient stimulus onsets or offsets. The present results further suggest that the neural generators responsible for the SSVEP are different (at least in laterality) from those manifested by the transient VEP, and the underlying brain systems can be further differentiated in future studies using source localization techniques.