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Related Concept Videos

Perceptual Constancy01:12

Perceptual Constancy

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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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Perception01:28

Perception

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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.
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Depth Perception and Spatial Vision01:15

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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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Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

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The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
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Auditory Perception01:17

Auditory Perception

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The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...
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Visualizing Visual Adaptation
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Perceptual constancy with a novel sensory skill.

Liam J Norman1, Lore Thaler1

  • 1Department of Psychology, Durham University.

Journal of Experimental Psychology. Human Perception and Performance
|December 3, 2020
PubMed
Summary

Perceptual constancy, the stable perception of objects, is intrinsic to human perception. Training sighted individuals in echolocation demonstrated that this constancy can be learned even in novel sensory experiences.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Sensory Perception

Background:

  • Perceptual constancy is crucial for understanding the world.
  • It enables stable object perception despite sensory variations.
  • Its intrinsic nature in human perception remains debated.

Purpose of the Study:

  • To investigate if perceptual constancy is an innate ability.
  • To determine if constancy can be learned in a novel sensory domain.
  • To explore the role of experience in developing perceptual constancy.

Main Methods:

  • Participants judged echo differences in click-based echolocation.
  • Two conditions tested: click variation vs. object variation.
  • Compared performance of blind experts, novices, and sighted controls with training.

Main Results:

  • Blind experts showed high spontaneous constancy for spectral changes.
  • Novices (sighted and blind) exhibited significantly lower constancy.
  • Sighted controls rapidly acquired constancy through training.

Conclusions:

  • Perceptual constancy can emerge in novel sensory skills.
  • Learning and experience play a key role in developing constancy.
  • Findings strongly suggest perceptual constancy is intrinsic to human perception.