Event‐related potential patterns of selective attention modulated by perceptual load

Author:

Chen Zhuo1ORCID,Qin Yun12,Peng Maoqin1,Zhao Wei1,Shi Xuqian1,Lai Danwei1,Yin Erwei3,Yan Ye3,Yao Dezhong12,Liu Tiejun12

Affiliation:

1. The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Lab for Neuroinformation University of Electronic Science and Technology of China Chengdu China

2. Sichuan Institute for Brain Science and Brain‐Inspired Intelligence Chengdu China

3. The Defense Innovation Institute Academy of Military Sciences Beijing China

Abstract

AbstractIntroductionA high perceptual load can effectively prevent attention from being drawn to irrelevant stimuli; however, the neural pattern underlying this process remains unclear.MethodsThis study adopted a perceptual load paradigm to examine the temporal processes of attentional modulation by incorporating conditions of perceptual load, distractor‐target compatibility, and eccentricity.ResultsThe behavioral results showed that a high perceptual load significantly reduced attentional distraction caused by peripheral distractors. The event‐related potential results further revealed that shorter P2 latencies were observed for peripheral distractors than for central distractors under a high perceptual load and that a suppressed compatibility effect with increasing load was reflected by the P3 component.ConclusionThese findings suggested that (1) P2 and P3 components effectively captured different sides of attentional processing modulated by load (i.e., the filter processing of the object and the overall attentional resource allocation) and (2) response patterns of selective attention modulated by perceptual load were influenced by eccentricity. Our electrophysiological evidence confirmed the behavioral findings, indicating the neural mechanisms of attentional modulation.

Publisher

Wiley

Subject

Behavioral Neuroscience

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