Related Experiment Video
Updated: Jul 12, 2026
05:43
Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
Published on: May 23, 2019
Roughness perception in haptic virtual reality for sighted and blind people
Diana Kornbrot1, Paul Penn, Helen Petrie
1School of Psychology, University of Hertfordshire, Hatfield, England. d.e.kornbrot@herts.ac.uk
Perception & Psychophysics
|August 31, 2007
Summary
This study explored perceived roughness in virtual reality, finding consistent power law exponents across blind and sighted individuals. Haptic interface design and roughness perception theories are discussed.
Area of Science:
- Haptic Perception
- Virtual Reality
- Psychophysics
Background:
- Previous research established psychophysical functions for perceived roughness using rigid probes in physical reality.
- Understanding tactile perception in virtual environments is crucial for developing realistic haptic interfaces.
Purpose of the Study:
- To investigate psychophysical functions for perceived roughness in virtual reality.
- To compare roughness perception between blind and sighted participants using a force feedback device.
- To examine the influence of visual status on roughness perception and power law exponents.
Main Methods:
- Participants (blind and sighted) evaluated perceived roughness of sinusoidal surfaces in virtual reality.
- The PHANToM force feedback device was used to render stimuli with varying groove widths (0.675 mm to 20.700 mm).
- Log-log psychophysical functions relating roughness magnitude estimates to groove width were analyzed.
Main Results:
- Group functions exhibited nonlinearity, similar to findings in physical reality.
- Individual functions varied, with most participants showing linear or quadratic relationships.
- No significant effect of visual status was found on individual power law exponents, which consistently approximated -0.80.
Conclusions:
- Virtual reality haptic interfaces can replicate non-linear roughness perception observed in physical reality.
- Individual variability in psychophysical functions warrants consideration in data analysis and interface design.
- The consistent power law exponent suggests a robust underlying mechanism for tactile roughness perception, irrespective of visual status.
Related Concept Videos
01:27Tactile and Chemical Senses
Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex. This...
01:15Depth 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.
01:15Sensory 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...
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...
01:29Sight Distance in a Vertical Curve
Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...
01:11Sensory 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...
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...
01:33Somatosensation
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.