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Related Experiment Video

Updated: Mar 30, 2026

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
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Deaf, blind or deaf-blind: Is touch enhanced?

Costanza Papagno1,2, Carlo Cecchetto3, Alberto Pisoni3,4

  • 1Department of Psychology, University of Milano-Bicocca, Piazza dell'Ateneo Nuovo 1, 20126, Milan, Italy. costanza.papagno@unimib.it.

Experimental Brain Research
|November 18, 2015
PubMed
Summary

Sensory loss impacts touch perception differently in deaf, blind, and deaf-blind individuals. Tactile spatial tasks were better for deaf and deaf-blind groups, while temporal tasks were better for blind individuals and controls.

Keywords:
BlindnessDeaf-blindDeafnessTactile spatial discriminationTactile temporal discrimination

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Area of Science:

  • Neuroscience
  • Sensory Perception
  • Human Psychology

Background:

  • The brain can reorganize sensory processing when one sense is lost, potentially affecting other senses.
  • Understanding how deafness and blindness impact the spared sense of touch is crucial for grasping sensory compensation mechanisms.

Purpose of the Study:

  • To investigate the effects of combined sensory loss (deafness and blindness) on tactile spatial and temporal discrimination.
  • To determine if the type of sensory loss influences tactile performance in the spared sense.

Main Methods:

  • Evaluated tactile spatial and temporal discrimination in deaf, blind, deaf-blind, and control participants.
  • Compared performance across different sensory-deprived groups and a sighted, hearing control group.

Main Results:

  • Deaf and deaf-blind individuals performed better on spatial tactile tasks than temporal ones, unlike blind individuals and controls.
  • Deaf and deaf-blind participants showed impairments in temporal discrimination compared to controls.
  • Deaf-blind individuals outperformed blind individuals in spatial tactile tasks, but overall, sensory deprivation did not enhance tactile performance.

Conclusions:

  • Tactile spatial processing may be prioritized over temporal processing in individuals with combined sensory loss.
  • Discriminative touch might be less critical in humans compared to social touch, suggesting potential for different compensatory strategies.
  • More complex tactile tasks might be necessary to reveal enhanced tactile abilities in sensory-deprived populations.