Neural differences between chromatic- and luminance-driven attentional salience in visual search.

ABSTRACT: Previous electroencephalographic research on attentional salience did not fully capture the complexities of low-level vision, which relies on both cone-opponent chromatic and cone-additive luminance mechanisms. We systematically varied color and luminance contrast using a visual search task for a higher contrast target to assess the degree to which the salience-computing attentional mechanisms are constrained by low-level visual inputs. In our first experiment, stimuli were defined by contrast that isolated chromatic or luminance mechanisms. In our second experiment, targets were defined by contrasts that isolated or combined achromatic and chromatic mechanisms. In both experiments, event-related potential waveforms contralateral and ipsilateral to the target were qualitatively different f

SUBMITTER: Hardman A 

PROVIDER: S-EPMC7408945 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature