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Lower pitch is larger, yet falling pitches shrink
Zohar Eitan1, Asi Schupak2, Alex Gotler3
1School of Music, Tel Aviv University, <location>Israel</location>
Experimental Psychology
|December 20, 2013
Summary
Higher pitch usually means smaller size, but dynamic sounds change this. Ascending pitch pairs with growing size, and descending pitch with shrinking size in dynamic auditory-visual interactions.
Area of Science:
- Cross-modal perception
- Auditory-visual interactions
- Psychophysics
Background:
- Previous research shows pitch and visual size interact, with higher pitch typically associated with smaller size.
- Most prior studies utilized static stimuli, leaving the interaction of dynamic stimuli unexplored.
- Garner's speeded discrimination paradigm is a common tool for studying perceptual interactions.
Purpose of the Study:
- To investigate the cross-modal interaction between dynamic pitch and dynamic visual size.
- To compare the interactions of dynamic stimuli with those of static stimuli using an identical paradigm.
- To examine how changes in auditory and visual features influence perceptual congruence and interference effects.
Main Methods:
- Employed Garner's speeded discrimination paradigm with both dynamic and static auditory-visual stimuli.
- Experiment 1: Assessed interactions between continuous pitch changes (rising/falling) and size changes (increasing/decreasing).
- Experiment 2: Assessed interactions between static pitch levels (high/low) and static object sizes (large/small).
Main Results:
- Dynamic stimuli showed opposite interactions compared to static stimuli.
- For dynamic stimuli, ascending pitch was congruent with growing size, and descending pitch with shrinking size.
- Static stimuli exhibited both congruence and Garner effects, while dynamic stimuli showed congruence without Garner interference.
Conclusions:
- Static and dynamic auditory-visual stimuli can have opposing cross-modal mappings.
- Dynamic stimuli interactions may be influenced by within-trial changes and perceived distance cues.
- Different processing mechanisms may underlie the perception of static versus dynamic cross-modal interactions.
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