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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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Working Memory01:24

Working Memory

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Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
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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.
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
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Gestalt Principles of Perception01:21

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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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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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Methods for Presenting Real-world Objects Under Controlled Laboratory Conditions
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Material constancy in perception and working memory.

Hiroyuki Tsuda1,2, Munendo Fujimichi3,4, Mikuho Yokoyama5,6

  • 1Keio Advanced Research Center, Keio University, Tokyo, Japan.

Journal of Vision
|October 6, 2020
PubMed
Summary

Working memory is critical for material constancy, enabling the visual system to perceive object properties consistently despite changing viewing conditions. This memory system acts as a processing bottleneck, impacting both simultaneous and successive material perception.

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Area of Science:

  • Visual perception
  • Cognitive psychology
  • Neuroscience

Background:

  • The visual system faces challenges in maintaining constant perception of object properties amidst varying sensory input.
  • Material perception literature has under-emphasized the role of working memory in constancy tasks.
  • Understanding the interplay between perception and memory is crucial for explaining visual constancy.

Purpose of the Study:

  • To investigate the involvement and limits of working memory in material constancy.
  • To elucidate how working memory influences the perception of material properties under different viewing conditions.
  • To examine the role of working memory across simultaneous and successive matching tasks for material discrimination.

Main Methods:

  • Conducted experiments using simultaneous and successive matching-to-sample paradigms with diverse material stimuli (metals, glass, translucent objects).
  • Varied illumination contexts to test material constancy under changing viewing conditions.
  • Analyzed matching errors, self-reported strategies, and statistical image cues for material discrimination.

Main Results:

  • Material constancy was comparable across both simultaneous and successive matching conditions.
  • Participants employed similar information processing strategies for material discrimination in both paradigms.
  • Working memory was identified as a shared processing bottleneck influencing material constancy.

Conclusions:

  • Working memory plays a critical and integral role in achieving material constancy.
  • The findings highlight working memory's function as a constraint on both simultaneous and successive material perception.
  • This study provides converging evidence for the essential contribution of working memory to visual material perception.