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The Reliability of Individual Differences in VOT Imitation
Lacey Wade1, Wei Lai1, Meredith Tamminga1
1University of Pennsylvania, USA.
Language and Speech
|August 11, 2020
Summary
Individual differences in phonetic imitation are stable over time. People consistently imitate speech patterns, whether they move closer to or further from a model talker, showing reliable individual phonetic behaviors.
Area of Science:
- Phonetics
- Sociolinguistics
- Psycholinguistics
Background:
- Recent research indicates individual variations in phonetic behaviors beyond typical social factors.
- The stability of these individual phonetic differences over time remains largely unexplored.
Purpose of the Study:
- To investigate the individual-level stability of phonetic imitation.
- To determine if observed deviations from phonetic norms are consistent characteristics of individuals.
Main Methods:
- A test-retest design was employed using a lexical shadowing task.
- Participants imitated a model talker's artificially-lengthened voice-onset time (VOT).
- The same participants performed the task on two separate occasions.
Main Results:
- Individual imitation patterns (convergence or divergence in VOT) showed high correlation across test-retest sessions.
- A strong correlation was found between individual VOT shifts towards male and female model talkers.
- Phonetic imitation stability was confirmed at the individual level.
Conclusions:
- Individual differences in phonetic behavior, particularly imitation, are stable characteristics.
- Averaging group data can obscure the complexity and individuality of phonetic processes.
- Individual phonetic variability warrants further investigation.
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