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Related Concept Videos

Visual System01:26

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Gestalt Principles of Perception01:21

Gestalt Principles of Perception

Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Parallel Processing01:20

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...

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Related Experiment Video

Updated: May 28, 2026

VisualEyes: A Modular Software System for Oculomotor Experimentation
10:41

VisualEyes: A Modular Software System for Oculomotor Experimentation

Published on: March 25, 2011

Space-, object-, and feature-based attention interact to organize visual scenes.

Dwight J Kravitz1, Marlene Behrmann

  • 1Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD 20892, USA. kravitzd@mail.nih.gov

Attention, Perception & Psychophysics
|October 19, 2011
PubMed
Summary
This summary is machine-generated.

Attention involves interactions across spatial, feature, and object representations. Focusing on one stimulus type simultaneously influences others, enhancing processing and creating a unified attentional effect across the visual scene.

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Last Updated: May 28, 2026

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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

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06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Biased-competition models suggest attention stems from distributed interactions among perceptual representations.
  • Previous research focused on individual attentional types (spatial, featural, object-based) rather than their combined effects.

Purpose of the Study:

  • To investigate the interaction between space-, feature-, and object-based attention.
  • To test the prediction that attending to a stimulus activates all associated perceptual representations simultaneously.
  • To provide evidence for the biased-competition framework of attentional processing.

Main Methods:

  • Participants viewed visual displays where objects were cued.
  • The study measured processing enhancements related to spatial, feature, and object-based attention.
  • Experimental design focused on observing interactions when a single object was attended.

Main Results:

  • Attending to a cued object triggered simultaneous interactions across space-, feature-, and object-based attention.
  • This interaction led to enhanced processing of the attended object.
  • A scene-wide pattern of attentional facilitation was observed, supporting integrated attentional mechanisms.

Conclusions:

  • The findings support the biased-competition framework for attentional processing.
  • Attention acts as a coordinating mechanism for disparate visual perceptual representations.
  • Both bottom-up and top-down influences are integrated and preferentially enhanced by attention.