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Perceptually plausible sounds facilitate visually induced self-motion perception (vection)
Takeharu Seno1, Emi Hasuo, Hiroyuki Ito
1Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami-ku, Fukuoka 815-8540, Japan. seno@design.kyushu-u.ac.jp
Perception
|October 3, 2012
Summary
Auditory stimuli can enhance visually induced illusory self-motion (vection). Sounds increasing in intensity boosted forward vection, while frequency changes aided vertical vection, suggesting perceptual plausibility is key.
Area of Science:
- Multisensory perception
- Auditory-visual interaction
- Human psychophysics
Background:
- Visually induced self-motion (vection) is a complex perceptual phenomenon.
- The influence of auditory stimuli on vection remains less explored.
- Understanding multisensory integration is crucial for explaining perceptual experiences.
Purpose of the Study:
- To investigate the impact of auditory stimuli on visually induced illusory self-motion (vection).
- To determine specific sound characteristics that modulate vection.
- To explore the role of perceptual plausibility in auditory-visual vection enhancement.
Main Methods:
- Participants experienced visual stimuli (radial motion, drifting gratings) for 40 seconds.
- Auditory stimuli (changing intensity or frequency) were presented concurrently with visual stimuli.
- Subjective reports of vection were collected to assess perceptual changes.
Main Results:
- Sounds with increasing intensity significantly facilitated forward vection.
- Sounds with ascending or descending frequencies enhanced upward or downward vection, respectively.
- The perceptual plausibility of the sound-visual correspondence appeared to be a critical factor.
Conclusions:
- Auditory cues can modulate and enhance visually induced self-motion.
- Specific acoustic properties (intensity, frequency) differentially affect vection direction.
- Perceptual congruence between auditory and visual stimuli is important for multisensory enhancement of vection.
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