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Related Concept Videos

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...
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.

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Related Experiment Video

Updated: Jun 1, 2026

Tactile Semiautomatic Passive-Finger Angle Stimulator (TSPAS)
04:40

Tactile Semiautomatic Passive-Finger Angle Stimulator (TSPAS)

Published on: July 30, 2020

Spatial effects on tactile duration categorization.

Simon Grondin1, Tsuyoshi Kuroda, Takako Mitsudo

  • 1École de psychologie, 2325 rue des Bibliothèques, Université Laval, Quèbec, QC, Canada, G1V 0A6. simon.grondin@psy.ulaval.ca

Canadian Journal of Experimental Psychology = Revue Canadienne De Psychologie Experimentale
|June 7, 2011
PubMed
Summary
This summary is machine-generated.

Tactile stimulus distance impacts perceived time. Signals on different hands make intervals seem longer, while same-hand signals improve temporal discrimination, supporting the kappa effect over attentional theories.

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Last Updated: Jun 1, 2026

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Published on: July 30, 2020

Assessment of Spatial Lingual Tactile Sensitivity using a Gratings Orientation Test
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Published on: September 17, 2021

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07:32

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects

Published on: September 1, 2016

Area of Science:

  • Psychology
  • Neuroscience
  • Sensory Perception

Background:

  • Understanding temporal perception is crucial for cognitive science.
  • The influence of sensory modality and spatial separation on time perception is not fully understood.
  • Previous research suggests spatial factors can influence temporal judgments.

Purpose of the Study:

  • To investigate how the spatial distance between tactile stimuli affects perceived duration.
  • To determine the impact of stimulus location (same vs. different hands) on temporal threshold estimates.
  • To explore the underlying mechanisms, such as the kappa effect or attentional processes, influencing these perceptions.

Main Methods:

  • Participants judged intervals marked by tactile stimuli delivered to the left (L) or right (R) hand.
  • Stimuli were presented on the same hand (L-L, R-R) or different hands (L-R, R-L).
  • Hand placement varied between nearby and a distance of 3 feet (91 cm), with psychometric functions analyzed for each condition.

Main Results:

  • Intervals marked by stimuli on different hands were perceived as longer than those on the same hand.
  • No significant difference in perceived duration was found between L-L and R-R, or between L-R and R-L conditions.
  • Temporal discrimination was more accurate when stimuli were delivered to the same hand compared to different hands.

Conclusions:

  • The spatial separation and hand-contingent delivery of tactile stimuli significantly modulate perceived duration.
  • Findings align with the kappa effect, suggesting a spatial-temporal integration mechanism.
  • Results do not support an attentional account for duration discrimination in this context.