Feature selection in the human brain: electrophysiological correlates of sensory enhancement and feature integration.

ABSTRACT: This study examined the latency and amplitude of cortical processes associated with feature-based visual selective attention, using frequency-domain and time-domain measures derived from dense-array electroencephalography. Participants were asked to identify targets based on conjunctions of three types of object features (color, size, and completeness). This procedure aimed to examine (1) the modulation of sensory responses to one or more stimulus features characterizing an object and (2) the facilitation and reduction effects associated with competing features, attended and unattended, in the same object. The selection negativity, an event-related potential measure of sensory amplification for attended features, showed a parametric increase of amplitude as a function of the number of atte

SUBMITTER: Keil A 

PROVIDER: S-EPMC3664361 | biostudies-literature | 2010 Feb

REPOSITORIES: biostudies-literature