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Navigation using sensory substitution in real and virtual mazes.

Daniel-Robert Chebat1, Shachar Maidenbaum2, Amir Amedi2

  • 1The Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, Hebrew University of Jerusalem, Hadassah Ein-Kerem, Jerusalem, Israel; The Edmond and Lily Safra Center for Brain Research, Hebrew University of Jerusalem, Hadassah Ein-Kerem, Jerusalem, Israel; Department of Behavioral Sciences, Ariel University, Ariel, Israel.

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Summary

Sensory Substitution Devices (SSDs) like the EyeCane improve spatial navigation for blind individuals. Training with the EyeCane enabled participants to navigate mazes with fewer errors and in less time, nearing sighted performance levels.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Human-Computer Interaction

Background:

  • Spatial perception in blind individuals is often impaired, raising questions about the impact of visual information absence during development.
  • Sensory Substitution Devices (SSDs) offer a method to transfer visual data to other senses, aiding research into spatial cognition.
  • The EyeCane, an SSD translating distance into auditory and haptic feedback, is explored as a tool to enhance spatial navigation.

Purpose of the Study:

  • To investigate if the EyeCane SSD can enable blind individuals to achieve spatial navigation performance comparable to sighted individuals.
  • To assess the efficacy of SSDs in overcoming deficits in spatial cognition potentially caused by lifelong visual deprivation.

Main Methods:

  • Fifty-six participants, including congenitally blind, late blind, blindfolded sighted, and sighted controls, trained with the EyeCane SSD.
  • Participants navigated real and virtual mazes using the EyeCane, with performance tracked across training sessions.
  • Data collected included maze completion time, number of errors, and collisions.

Main Results:

  • Participants demonstrated significant improvement with EyeCane training, showing fewer errors, collisions, and reduced navigation time from the first to the last session.
  • By the third training session, participants' performance in terms of errors, time, and collisions approached the initial performance levels of the sighted control group.
  • The study indicates that SSDs can facilitate substantial gains in spatial navigation abilities for individuals with visual impairments.

Conclusions:

  • The EyeCane SSD effectively enhances spatial navigation skills in blind individuals.
  • The findings suggest that with appropriate sensory substitution, spatial cognition can be significantly improved, even in cases of early-onset blindness.
  • SSDs represent a promising technological intervention for improving independence and mobility for visually impaired populations.