Competition explains limited attention and perceptual resources: Implications for perceptual load and dilution theories

Paige E. Scalf, Ana Torralbo, Evelina Tapia, Diane M. Beck

Research output: Contribution to journalReview article

Abstract

Both perceptual load theory and dilution theory purport to explain when and why task-irrelevant information, or so-called distractors are processed. Central to both explanations is the notion of limited resources, although the theories differ in the precise way in which those limitations affect distractor processing. We have recently proposed a neurally plausible explanation of limited resources in which neural competition among stimuli hinders their representation in the brain. This view of limited capacity can also explain distractor processing, whereby the competitive interactions and bias imposed to resolve the competition determine the extent to which a distractor is processed. This idea is compatible with aspects of both perceptual load and dilution models of distractor processing, but also serves to highlight their differences. Here we review the evidence in favor of a biased competition view of limited resources and relate these ideas to both classic perceptual load theory and dilution theory.

Original languageEnglish (US)
Article numberArticle 243
JournalFrontiers in Psychology
Volume4
Issue numberMAY
DOIs
StatePublished - 2013

Keywords

  • Competition
  • Dilution
  • Limited capacity
  • Limited resources
  • Perceptual load

ASJC Scopus subject areas

  • Psychology(all)

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