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Adaptive dispersion in vowel perception.

K Johnson¹

¹Department of Linguistics, Ohio State University, Columbus 43210-1298, kjohnson@ling.ohio-state.edu

|September 19, 2000

Summary

The hyperspace effect in vowel perception is influenced by consonant context and talker familiarity. However, listeners

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Area of Science:

Psycholinguistics
Auditory Perception
Phonetics

Background:

The hyperspace effect suggests adaptive dispersion is an active perceptual process in vowel perception.
Previous research on adaptive dispersion used isolated vowels in unfamiliar voices, potentially limiting findings.

Purpose of the Study:

To investigate the influence of consonant context and talker familiarity on the hyperspace effect.
To determine if adaptive dispersion is modulated by contextual and familiarity factors.

Main Methods:

Experimentation involving vowel stimuli presented with varying consonant contexts.
Utilizing familiar and unfamiliar talkers to assess familiarity effects.
Analysis of listeners' preferred perceptual spaces in relation to production vowel spaces.

Main Results:

Both consonant context and talker familiarity were found to modulate the hyperspace effect.
The observed reductions in the hyperspace effect due to context and familiarity were minimal.
Listeners' perceptual spaces remained hyperarticulated compared to the actual production vowel space.

Conclusions:

Adaptive dispersion in vowel perception is influenced by linguistic context and talker familiarity.
Despite modulation, listeners' perceptual systems maintain a degree of hyperarticulation.
Findings suggest active perceptual processes shape vowel space representation.

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