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Motion-Acuity Test for Visual Field Acuity Measurement with Motion-Defined Shapes
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Sound frequency and aural selectivity in sound-contingent visual motion aftereffect
Maori Kobayashi1, Wataru Teramoto, Souta Hidaka
1Research Institute of Electrical Communication, Tohoku University, Sendai, Miyagi, Japan. te11001@meiji.ac.jp
Plos One
|June 1, 2012
Summary
Auditory processing for audiovisual associations is selective, requiring matching sound frequencies and ear presentation for motion aftereffects. This suggests early-stage auditory mechanisms are involved in cross-modal perception.
Area of Science:
- Neuroscience
- Auditory Perception
- Multisensory Integration
Background:
- Evaluating common external events relies on cross-modal associations.
- Audiovisual adaptation can lead to illusory motion perception driven by auditory stimuli.
- Mechanisms of this audiovisual aftereffect, including auditory processing selectivity, are not fully understood.
Purpose of the Study:
- To investigate the selectivity of auditory processing in audiovisual association.
- To determine if the audiovisual motion aftereffect transfers across sound frequencies.
- To examine if the aftereffect transfers between ears (interaural transfer).
Main Methods:
- Participants were exposed to alternating visual apparent motion with unique auditory tones.
- After adaptation, the effect of tones on illusory motion perception was tested.
- Tests varied tone frequency and ear of presentation between adaptation and testing phases.
Main Results:
- Auditory tones, after adaptation, induced illusory motion perception.
- The aftereffect was contingent on the adapter and test tones sharing the same frequency.
- The aftereffect was also specific to the same ear of presentation, showing no interaural transfer.
Conclusions:
- Auditory processing for novel audiovisual associations is frequency-selective.
- The findings suggest that the underlying auditory mechanisms are ear-specific.
- This selectivity may indicate involvement of early-stage auditory processing in cross-modal learning.
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