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Related Experiment Video

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Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

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Can a space-perception conflict be solved with three sense modalities?

Felice L Bedford¹

¹Department of Psychology, University of Arizona, Tucson, AZ 85721, USA. bedford@u.arizona.edu

|June 15, 2007

Summary

When vision and proprioception conflict, adding auditory cues surprisingly did not resolve the three-way sensory conflict. Instead, adaptation favored resolving simpler, two-way conflicts.

Area of Science:

Neuroscience
Sensory Perception
Human Factors

Background:

Conflicting sensory information between vision and proprioception presents an ambiguous situation for the brain.
Research on how the brain integrates or resolves conflicts involving three sensory modalities is limited.

Purpose of the Study:

To investigate how the brain resolves cross-modal conflicts involving vision, proprioception, and audition.
To test the hypothesis that adaptation favors the modality with fewer conflicting inputs.

Main Methods:

A prism was used to create a visual-proprioceptive conflict.
Auditory information was introduced to either align with vision (Group 1), proprioception (Group 2), or be absent (Group 3).
Adaptation of arm proprioception and visual perception was measured.

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Main Results:

Adaptation showed a large shift in proprioception and a small shift in vision in Group 2 (audition aligned with proprioception).
Adaptation showed a small shift in proprioception and a large shift in vision in Group 1 (audition aligned with vision).
Group 1's adaptation was not significantly different from Group 3 (no auditory information).

Conclusions:

The brain appears to adapt to separate two-way conflicts rather than directly solving a three-way conflict.
Direction of attention may influence how sensory conflicts are resolved.
Findings challenge the prediction that adaptation favors the least represented modality in a three-way conflict.