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Gradient phonological inconsistency affects vocabulary learning.
Kristin L Muench1, Sarah C Creel
1Department of Cognitive Science.
Language learners struggle with phonologically inconsistent input from multiple accents. Vocabulary acquisition slows when sound differences exceed one feature, impacting learning from varied speech.
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Area of Science:
- Psycholinguistics
- Speech Perception
- Language Acquisition
Background:
- Learners encounter phonologically inconsistent input, like multiple accents, but its impact on language learning is unclear.
- Previous research suggests learners can extract consistent patterns from variable input.
Purpose of the Study:
- To investigate how phonological inconsistency affects vocabulary acquisition.
- To determine the effects of varying degrees of inconsistency and phonological competition.
Main Methods:
- Experiment 1: Adults learned vocabularies with varying degrees of phonological inconsistency.
- Experiment 2: Assessed word-form inconsistency without phonological competition, comparing learning across one vs. two accents.
Main Results:
- Adults learned inconsistent vocabularies slower than consistent ones.
- Learning was slower with two accents than one, but faster when forms were similar (/vig/ = /vIg/) than distinct (/vig/ = /dIdʒ/).
- Difficulty increased when forms differed by more than one phonological feature and with greater phonological competition.
Conclusions:
- Phonological inconsistency, especially significant form differences and competition, hinders vocabulary acquisition.
- Learners face challenges with variable input when multiple accents introduce substantial phonetic variation.

