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Related Concept Videos

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...
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...
Perception01:28

Perception

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...
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...
Factors Affecting Perception01:25

Factors Affecting Perception

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...
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.

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Creating Objects and Object Categories for Studying Perception and Perceptual Learning
14:38

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

A neural basis for inference in perceptual ambiguity.

Philipp Sterzer1, Andreas Kleinschmidt

  • 1Department of Neurology, Johann Wolfgang Goethe University, Theodor-Stern-Kai 7, D-60590 Frankfurt am Main, Germany. philipp.sterzer@charite.de

Proceedings of the National Academy of Sciences of the United States of America
|December 28, 2006
PubMed
Summary

The brain

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Perception

Background:

  • Perceptual rivalry involves spontaneous shifts between competing interpretations of unchanging visual stimuli.
  • The neural basis for these shifts, particularly the role of higher-order brain areas, remains debated.

Purpose of the Study:

  • To investigate whether higher-order brain regions initiate spontaneous perceptual switches during visual rivalry.
  • To differentiate the neural correlates of spontaneous versus stimulus-driven perceptual changes.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity in human observers.
  • Observers viewed ambiguous apparent motion stimuli and reported perceptual changes.
  • A control condition replayed perceptual switch sequences using disambiguated stimuli.

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Cross-Modal Multivariate Pattern Analysis
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Cross-Modal Multivariate Pattern Analysis

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Last Updated: Jul 18, 2026

Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Creating Objects and Object Categories for Studying Perception and Perceptual Learning

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Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
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Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues

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Cross-Modal Multivariate Pattern Analysis
13:51

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Main Results:

  • Greater activation in the inferior frontal cortex (IFC) bilaterally was observed during spontaneous compared to stimulus-driven switches.
  • Right IFC activation preceded visual cortex activation during spontaneous switches.
  • This temporal precedence suggests the right IFC initiates spontaneous perceptual shifts.

Conclusions:

  • Higher-order brain areas, specifically the right inferior frontal cortex, play a causal role in initiating spontaneous perceptual switches.
  • The findings provide insights into how the brain resolves perceptual ambiguity and makes decisions about sensory input.
  • This research offers a signature for understanding the neural timing of perceptual decision-making.