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Sensory Perception: Organization of the Somatosensory System

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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:
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Related Experiment Video

Updated: May 31, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

Similarity and categorization: from vision to touch.

Nina Gaissert¹, Heinrich H Bülthoff, Christian Wallraven

¹Max Planck Institute for Biological Cybernetics, Tübingen, Spemannstr. 38, 72076 Tübingen, Germany. Nina.Gaissert@tuebingen.mpg.de

Acta Psychologica

|July 15, 2011

Summary

This summary is machine-generated.

Human categorization relies on multiple senses. This study shows touch (haptic) and sight (visual) perception are equally effective for categorizing complex objects, revealing similar underlying cognitive processes for both modalities.

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Creating Objects and Object Categories for Studying Perception and Perceptual Learning

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Published on: November 2, 2012

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A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

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Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

Area of Science:

Cognitive Psychology
Neuroscience
Sensory Perception

Background:

Human development integrates multiple sensory inputs for perception.
Previous categorization research predominantly focused on visual information.
Understanding multisensory integration is crucial for explaining cognitive processes.

Purpose of the Study:

To investigate the role of visual and haptic modalities in object categorization.
To compare the perceptual spaces derived from visual and haptic information.
To determine if similar categorization mechanisms are employed across different sensory modalities.

Main Methods:

Utilized a three-dimensional object space with parametrically defined objects.
Collected similarity ratings and analyzed perceptual spaces using multidimensional scaling.
Conducted unconstrained, semi-constrained, and constrained categorization tasks.

Main Results:

Haptic perception matched visual perception in representing object space topology.
Both modalities were equally effective in solving categorization tasks.
Within-category similarity exceeded across-category similarity, explaining categorization behavior.

Conclusions:

The haptic modality is as effective as the visual modality for object categorization.
Perceptual spaces derived from similarity ratings can predict categorization outcomes.
Similar cognitive processes underlie categorization across visual and haptic senses.