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Related Concept Videos

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...
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...
Naturalistic Observations02:30

Naturalistic Observations

If you want to understand how behavior occurs, one of the best ways to gain information is to simply observe the behavior in its natural context. However, people might change their behavior in unexpected ways if they know they are being observed. How do researchers obtain accurate information when people tend to hide their natural behavior? As an example, imagine that your professor asks everyone in your class to raise their hand if they always wash their hands after using the restroom. Chances...
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...
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...
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...

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Related Experiment Video

Updated: May 30, 2026

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
13:00

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments

Published on: January 23, 2017

Natural-scene perception requires attention.

Michael A Cohen1, George A Alvarez, Ken Nakayama

  • 1Department of Psychology, Harvard University, William James Hall, 33 Kirkland St., Cambridge, MA 02138, USA. michaelthecohen@gmail.com

Psychological Science
|August 16, 2011
PubMed
Summary
This summary is machine-generated.

Visual attention is necessary for visual consciousness. New research shows that natural scene perception requires attention, refuting claims that awareness can occur without it.

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06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Recent research suggests visual awareness can occur independently of visual attention.
  • This idea is often supported by the claim that natural scene perception (gist perception) is an automatic, preattentive process.
  • However, the necessity of attention for visual consciousness remains debated.

Purpose of the Study:

  • To investigate whether visual attention is required for the perception of natural scenes.
  • To challenge the notion that scene perception can occur without attention.
  • To determine if scene perception is a preattentive process.

Main Methods:

  • Employing demanding, sustained-attention tasks to assess inattentional blindness for natural scenes.
  • Utilizing dual-task paradigms where the primary task's attentional load was systematically varied.
  • Measuring scene perception performance under different attentional load conditions.

Main Results:

  • Inattentional blindness for natural scenes was observed when participants engaged in demanding sustained-attention tasks.
  • Scene perception was significantly impaired under dual-task conditions, particularly when the primary task imposed a high attentional demand.
  • These results indicate that previous studies may not have sufficiently engaged attention.

Conclusions:

  • Natural scene perception is not a preattentive process and requires visual attention.
  • The findings challenge the hypothesis of awareness without attention, suggesting attention is crucial for conscious visual experience.
  • This research underscores the integral role of attention in processing complex visual information.