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Related Concept Videos

Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

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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.
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Gestalt Principles of Perception01:21

Gestalt Principles of Perception

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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...
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Factors Affecting Perception01:25

Factors Affecting Perception

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Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
An illustrative example of a perceptual set is the scenario where an airline pilot told...
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Vision01:24

Vision

59.2K
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.
59.2K
Visual System01:26

Visual System

1.6K
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...
1.6K
Perceptual Constancy01:12

Perceptual Constancy

1.2K
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...
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Related Experiment Video

Updated: Jan 6, 2026

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects
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Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects

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[Perception in space. Visual aspects of space perception]

F Viader1

  • 1Service de Neurologie Vastel, CHRU, Caen.

Revue Neurologique
|August 1, 1995
PubMed
Summary

Vision is key to spatial awareness, involving complex perceptive and cognitive processes. Right hemisphere dominance is crucial for spatial tasks like localization and depth perception, with attention deficits causing syndromes like unilateral spatial neglect.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visual Perception

Context:

  • Spatial awareness relies on vision, involving perceptive and cognitive processes.
  • Right hemisphere superiority is evident in spatial tasks like stimulus localization and line orientation discrimination.
  • Depth perception utilizes both indirect cues and specific stereoscopic processes, with right-hemisphere dominance for global stereoscopy.

Purpose:

  • To explore the neural underpinnings of spatial apprehension and appropriation.
  • To investigate the roles of different brain regions and processes in visual perception, spatial orientation, and attention.
  • To examine the impact of attentional disruptions, such as simultagnosia and unilateral spatial neglect (USN), on spatial awareness.

Summary:

  • Vision plays a primary role in spatial awareness, with preliminary processing creating structured visual percepts.

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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
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  • Movement perception is integrated in area V5, while accurate spatial navigation relies on egocentric reference systems coded via eye/head position and proprioceptive/vestibular input to the parietal cortex.
  • Attentional processes, crucial for spatial awareness, can be disrupted, leading to conditions like simultagnosia and USN, often linked to interhemispheric attentional imbalance and hemispheric specialization.

    • Impact:

    • Understanding these processes is vital for diagnosing and treating spatial awareness disorders.
    • Highlights the critical role of the right hemisphere in spatial processing and attention.
    • Provides insights into the complex interplay between visual perception, spatial cognition, and attentional mechanisms.