Top-down modulation of early visual processing in V1 : dissociable neurophysiological effects of spatial attention, attentional load and task-relevance Ghent University
Until today, there is an ongoing discussion if attention processes interact with the information processing stream already at the level of the C1, the earliest visual electrophysiological response of the cortex. We used two highly powered experiments (each N = 52) and examined the effects of task relevance, spatial attention, and attentional load on individual C1 amplitudes for the upper or lower visual hemifield. Bayesian models revealed ...