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Related Experiment Video

Updated: Jun 17, 2025

Transcranial Direct Current Stimulation tDCS of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition

Transcranial Direct Current Stimulation tDCS of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition

Published on: July 13, 2019

Learning a language with vowelless words.

Georgia Zellou¹, Santiago Barreda¹, Mohamed Lahrouchi²

¹Linguistics Department, University of California, Davis, USA.

|August 7, 2024

Summary

Adults can quickly learn rare vowelless words through auditory exposure. However, learning these words is harder when speech styles vary, impacting acquisition of these unique lexical forms.

Keywords:

Phonetic variation Phonotactics Speech perception Vowelless words Word learning

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Last Updated: Jun 17, 2025

Transcranial Direct Current Stimulation tDCS of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition

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Published on: July 13, 2019

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Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

Published on: June 25, 2019

Area of Science:

Linguistics
Psycholinguistics
Phonetics

Background:

Vowelless words (e.g., Tashlhiyt's 'fkt') are typologically rare linguistic forms.
Previous research has not extensively studied the learnability of these rare word structures by adult language learners.

Purpose of the Study:

To investigate if adult English speakers find vowelless lexicons harder to acquire than voweled lexicons.
To explore how acoustic-phonetic variation (clear vs. casual speech) affects the learning of vowelless words.

Main Methods:

Adult participants were exposed to either vowelless or voweled lexicons.
Experiment 1 involved training with either clear or casual speech.
Experiment 2 trained participants using both clear and casual speech productions.

Main Results:

Listeners learned vowelless and voweled words equally well when speech style was consistent.
Learning of vowelless words decreased significantly when acoustic-phonetic forms varied during training.
Exposure to vowelless lexicons increased acceptance of novel vowelless words.

Conclusions:

Adults can rapidly acquire typologically rare vowelless words.
Acoustic-phonetic variability in speech input negatively impacts the learning of vowelless words.
Learners adapt to and accept novel vowelless forms after exposure.