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Related Concept Videos

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.
Prosopagnosia01:24

Prosopagnosia

Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
Visual Agnosia01:12

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
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.
Perceptual Constancy01:12

Perceptual Constancy

Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
Spinal Cord: Information Processing01:10

Spinal Cord: Information Processing

The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...

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Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior
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Coding of identity-diagnostic information in transsaccadic object perception.

Caroline Van Eccelpoel1, Filip Germeys, Peter De Graef

  • 1Department of Psychology, University of Leuven, Leuven, Belgium.

Journal of Vision
|January 17, 2009
PubMed
Summary
This summary is machine-generated.

Object perception across saccades is task-dependent. Changes in depth orientation influence gaze duration when relevant, suggesting object models are accessed during transsaccadic integration for faster identification.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Visual processing relies on integrating information across eye movements (saccades).
  • Understanding how presaccadic information influences postsaccadic object processing is crucial for explaining visual perception continuity.

Purpose of the Study:

  • To investigate if presaccadic extrafoveal object previews affect postsaccadic foveal processing.
  • To determine the task-dependent nature of transsaccadic information integration.

Main Methods:

  • Four experiments involving visual arrays and instructed memory tasks.
  • Intrasaccadic changes in object properties (depth orientation, color) during saccades.
  • Analysis of gaze duration on objects post-saccade.

Main Results:

  • Gaze durations increased after intrasaccadic depth rotation when depth orientation was the task-relevant feature.
  • Color changes did not affect gaze duration unless color was the task-relevant feature.
  • Intrasaccadic depth rotation prolonged gaze durations even when tasks involved object categorization or orientation judgments, independent of explicit depth memory instructions.

Conclusions:

  • Transsaccadic integration of visual information is modulated by task relevance.
  • Orientation-dependent object models are accessed during object perception across saccades.
  • Transsaccadic integration expedites object identification by combining pre- and postsaccadic diagnostic information.