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Related Concept Videos

Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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Depth Perception and Spatial Vision

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Related Experiment Video

Updated: Jun 27, 2026

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
13:00

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments

Published on: January 23, 2017

Feature-based attention modulates feedforward visual processing.

Weiwei Zhang1, Steven J Luck

  • 1Center for Mind and Brain, University of California Davis, 267 Cousteau Place, Davis, California 95618, USA. wwzhang@ucdavis.edu

Nature Neuroscience
|November 26, 2008
PubMed
Summary
This summary is machine-generated.

Attention can select colors as early as locations, even with high competition. This challenges the idea that spatial attention always acts first, showing color attention can influence information processing independently and rapidly.

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception

Background:

  • The prevailing view suggests spatial attention precedes feature-based attention.
  • Previous research primarily tested attention under low-competition conditions.

Purpose of the Study:

  • To investigate whether feature-based attention (color) can influence early visual processing.
  • To determine if color attention operates as early as, and independently from, spatial attention.

Main Methods:

  • Human participants were presented with visual stimuli under conditions of increased competition.
  • Reaction times and neural responses (within 100 ms) were measured to assess attentional effects.

Main Results:

  • Color-based attention significantly influenced feedforward information processing.
  • These effects occurred within 100 ms of stimulus onset, even for unattended locations.
  • Color attention demonstrated early and independent operation compared to spatial attention.

Conclusions:

  • Feature-based attention, specifically color, can operate as early as spatial attention.
  • Attention's influence on early visual processing is not strictly limited by spatial selection.
  • These findings challenge traditional models of attentional selection stages.