Resting electroencephalography correlates of pseudoneglect: an individual differences approach.

We conducted an exploratory study to examine the resting electroencephalography (EEG) correlates of pseudoneglect, a phenomenon wherein neurologically intact individuals show greater attentional bias toward the left side compared with the right side of space. We took the resting EEG of 21 college students for 5 min and then had them complete a computerized line perception task, during which we asked them to judge the midpoint of horizontal lines on the screen. We computed EEG asymmetry measures for theta, alpha, beta, and gamma frequency bands for each of eight locations (right electrode activity-left electrode activity in the analogous location) and separately regressed these onto the degree of pseudoneglect using stepwise multiple regression analyses. We found significant effects for gamma, theta, and beta bands at location F3/4, indicating greater tonic right midfrontal activation in this location. These findings show that individuals with generally greater right midfrontal resting activation across theta, beta, and gamma bands also demonstrate pseudoneglect during a line perception task. These results lend a novel finding to the pseudoneglect literature, namely an individual differences corollary to current active task observations in the field.