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Related Concept Videos

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.
Somatosensation01:33

Somatosensation

The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the stimulus...
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...
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...
Sensory Modalities01:15

Sensory Modalities

Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
General senses refer to the broad category of sensory information detected by receptors in the body and can be further grouped into somatic and visceral senses. Somatic sensations include touch, pressure, temperature, and pain and are essential for navigating our environment and...

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Related Experiment Video

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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

Object and spatial imagery dimensions in visuo-haptic representations.

Simon Lacey1, Jonathan B Lin, K Sathian

  • 1Department of Neurology, Emory University School of Medicine, WMB-6000, 101 Woodruff Circle, Atlanta, GA 30322, USA. slacey@emory.edu

Experimental Brain Research
|March 23, 2011
PubMed
Summary
This summary is machine-generated.

This study reveals that both object and spatial dimensions of imagery exist in touch and multisensory experiences. This extends our understanding of how the brain processes sensory information beyond just vision.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Sensory Perception

Background:

  • Visual imagery has distinct object and spatial dimensions.
  • Object imagers focus on surface properties, while spatial imagers focus on shape.
  • Visual and haptic object representations share similarities, prompting investigation into haptic and multisensory continua.

Purpose of the Study:

  • To investigate if haptic and multisensory representations exhibit an object-spatial continuum, similar to visual imagery.
  • To determine if individual differences in imagery style impact performance in visual and haptic tasks.

Main Methods:

  • Experiment 1: Visual and haptic within-modal tasks assessing shape and texture discrimination.
  • Experiment 2: Re-analysis of a cross-modal shape discrimination task to evaluate texture influence.

Main Results:

  • In both visual and haptic modalities, spatial imagers ignored texture changes but not shape changes.
  • Object imagers ignored shape changes but not texture changes.
  • Spatial imagers discriminated shape across texture changes, while object imagers did not, with texture impairing performance more for object imagers.

Conclusions:

  • Object and spatial dimensions of imagery are present in haptic and multisensory representations.
  • Individual differences in imagery style influence sensory processing across different modalities.
  • This research provides the first evidence for an object-spatial continuum in non-visual imagery.