2006 Fiscal Year Final Research Report Summary
Crossmodal perception from visual and vestibular information
| Project/Area Number |
17530531
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Experimental psychology
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| Research Institution | Tohoku Gakuin University |
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Principal Investigator |
SAKURAI Kenzo Tohoku Gakuin University, Dept of Human Science, Professor (40183818)
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| Project Period (FY) |
2005 – 2006
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| Keywords | Experimental Psychology / Crossmodal perception / Vision / Vestibular |
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| Research Abstract |
Two kinds of crossmodal perception from vision and vestibular information were investigated. The first is self-motion perception when the directions of body movement from vision and vestibular are inconsistent each other. Previous studies revealed that the multimodal integration in the perception of rotational or linier self motion is an either-or process when the direction difference between visual and vestibular information is opposite (180 degrees), and a certain acceleration is required in perceiving the self-motion direction from vestibular sense dominantly. The combination of orthogonal directions of self-motion, however, has not been investigated. We presented real somatic motion and orthogonally directed optic flow patterns to observers, and examined whether the perceptual system in our brain is an either-or process OR it crossmodally integrates the inconsistent self-motion directions. From the results of this experiment and additional experiments with various direction differences in vision and vestibular information, we found that the limit of direction difference for this integration is 90 degrees.
The second is a color-contingent aftereffect of self-motion. Former studies reported an orientation-contingent color aftereffect, the McCollough effect, and another color aftereffect that is contingent to expanding and contracting spiral pattern. However, no crossmodal feature-contingent aftereffect has been reported. We examined whether a color-contingent self-motion aftereffect would occur or not, adapting observers to a combination of oscillatory real somatic motion and synchronized color visual stimulation, for example, forward/red and backward/green. Observers reported vision-vestibular crossmodal motion-aftereffect, i.e., expansion or contraction of a test spiral pattern, although no consistent color-contingent self-motion aftereffect was found.
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Research Products
(6 results)
