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Related Concept Videos

Perception01:28

Perception

541
Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
541
Perceptual Constancy01:12

Perceptual Constancy

495
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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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...
1.8K
Parallel Processing01:20

Parallel Processing

205
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...
205
Gestalt Principles of Perception01:21

Gestalt Principles of Perception

387
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...
387
Sensation01:21

Sensation

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Sensory receptors are specialized neurons that respond to specific types of external stimuli, initiating the process known as sensation. This occurs when sensory input, such as light entering the eye, is detected by these receptors, causing chemical changes in the cells of the retina. These cells then convert the sensory stimulus into action potentials that are transmitted to the central nervous system, a process termed transduction.
Absolute thresholds can quantify the sensitivity of sensory...
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Related Experiment Video

Updated: Aug 23, 2025

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
07:12

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Published on: April 11, 2025

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Perceptual Functioning.

Anne Giersch1, Vincent Laprévote2,3,4

  • 1University of Strasbourg, INSERM U1114, Centre Hospitalier Régional Universitaire de Strasbourg, Strasbourg, France. giersch@unistra.fr.

Current Topics in Behavioral Neurosciences
|October 28, 2022
PubMed
Summary
This summary is machine-generated.

Visual perception is altered in schizophrenia patients, impacting their interaction with the environment. Research explores these visual processing abnormalities, from basic sensitivity to complex timing, offering insights into the disorder.

Keywords:
MaskingPerceptionRetinaSchizophreniaTimingVisual integration

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Science

Background:

  • Visual perception abnormalities are prevalent in schizophrenia, despite not being a diagnostic criterion.
  • These alterations are linked to early psychosis phases, pathophysiology, and neural connectivity issues.

Purpose of the Study:

  • To summarize models guiding the study of perception in schizophrenia.
  • To review research on visual perception in schizophrenia patients.

Main Methods:

  • Exploration of contrast sensitivity, masking, and visual grouping.
  • Investigation of retinal processing and perception timing.

Main Results:

  • Visual perception is demonstrably altered across various processing levels in schizophrenia.
  • These alterations likely affect patient adaptation and environmental interaction.

Conclusions:

  • Understanding visual perception deficits is crucial for schizophrenia research.
  • Further investigation into specific perceptual domains can illuminate disease mechanisms.