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Related Concept Videos

Visual System01:26

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
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.
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Visual Agnosia01:12

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

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.
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...

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Related Experiment Video

Updated: Jun 4, 2026

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects
07:36

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects

Published on: November 30, 2018

Pictures and words in visual search.

A Paivio1, I Begg

  • 1Department of Psychology, University of Western Ontario, N6A 3K7, London, Ontario, Canada.

Memory & Cognition
|January 29, 2011
PubMed
Summary
This summary is machine-generated.

Searching for visual information is faster using pictures than words. This study suggests that dual-coding theory explains how we process and search for information presented in different formats.

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Last Updated: Jun 4, 2026

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Area of Science:

  • Cognitive Psychology
  • Human Perception
  • Information Processing

Background:

  • Understanding how humans search for and retrieve information is crucial in cognitive psychology.
  • Previous research has explored the differences in processing visual and verbal stimuli.
  • The dual-coding theory proposes that information is processed through both verbal and non-verbal (imaginal) channels.

Purpose of the Study:

  • To investigate the effect of stimulus modality (pictures vs. words) on visual search speed.
  • To examine how target modality interacts with array modality in visual search tasks.
  • To test the applicability of the dual-coding theory to visual search behavior.

Main Methods:

  • Participants performed visual search tasks across three experiments.
  • Stimuli included line drawings of objects, printed words, photographs of faces, and printed names.
  • Search times were recorded for different combinations of target and array item modalities.

Main Results:

  • In Experiments I and II, search was faster with pictures than words in the array, irrespective of target modality.
  • Picture targets were searched faster than word targets when the array also contained pictures.
  • Experiment III showed significantly slower search times when names were targets within an array of faces.

Conclusions:

  • Results support the dual-coding theory, indicating that information processed both verbally and imaginally can be accessed in either mode.
  • The efficiency of search depends on the cognitive representation and the modality of the search array.
  • Task demands, specifically the format of the search array, dictate whether verbal or non-verbal processing is prioritized.