We have previously reported an anxiolytic-sensitive human EEG biomarker, goal conflict specific rhythmicity (GCSR), using an auditory stop signal task (SST). Here we test if a visual SST could allow testing of GCSR in people with hearing impairments. The visual SST produced GCSR within the 4-12Hz band at the expected right frontal site, F8, but to a lesser extent than in previous auditory SSTs, possibly due to response instability. Positive GCSR appeared to be reduced by both buspirone (10mg), and triazolam (0.25mg), as previously; negative GCSR was increased. However, neuroticism, trait anxiety and Behavioural Inhibition System scores failed to show consistent positive correlations with GCSR, contrary to prediction. The visual SST generates anxiolytic-sensitive GCSR; but its limited extent and unexpected personality correlations suggest it needs further development to obtain quantitative equivalence with the auditory SST.
Keywords: Anxiolytic; Behavioural inhibition system; Conflict specific rhythmicity; Electroencephalography; Rhythmical slow activity; Stop signal task; Theta.
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