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The speed and temporal frequency of visual apparent motion modulate auditory duration perception
Xiang He1, Zijun Ke1, Zehua Wu1
1Department of Psychology, Sun Yat-Sen University, Guangzhou, 510006, China.
Scientific Reports
|July 12, 2023
Summary
Visual apparent motion influences auditory duration perception. Task-irrelevant visual cues, varying in speed and temporal frequency, alter how people perceive sound duration, affecting time perception.
Area of Science:
- Cognitive Psychology
- Auditory Perception
- Visual Perception
Background:
- Auditory duration perception is crucial for various cognitive functions.
- Cross-modal interactions, particularly between vision and audition, can significantly influence perceptual experiences.
- Visual apparent motion, a dynamic visual stimulus, has been explored for its potential to modulate other sensory modalities.
Purpose of the Study:
- To investigate how task-irrelevant visual apparent motion affects the perception of auditory duration.
- To examine the specific roles of visual apparent motion's speed and temporal frequency in modulating auditory duration judgments.
- To determine if visual apparent motion induces time dilation or compression effects on auditory stimuli.
Main Methods:
- Participants judged the duration of a target tone presented concurrently with visual stimuli.
- Visual stimuli included sequential bars creating apparent motion, with manipulated speed (interval between bars) and temporal frequency (number of bars).
- Experiments compared auditory duration perception under static visual conditions versus various visual apparent motion conditions.
Main Results:
- Slower visual apparent motion led to a larger point of subjective equality (PSE), indicating altered auditory duration perception.
- A time dilation effect (overestimation of duration) was observed in static conditions but diminished with apparent motion.
- Faster visual apparent motion (both physically and perceived) reduced the PSE and eliminated time dilation, suggesting time compression effects.
Conclusions:
- Concurrent visual apparent motion significantly modulates the perception of auditory duration.
- Both the speed and temporal frequency of visual apparent motion are critical factors influencing auditory duration judgments.
- Task-irrelevant visual motion can override intrinsic temporal biases in auditory perception, demonstrating robust cross-modal influences.
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