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Phonotactic probability influences speech production.

Matthew Goldrick1, Meredith Larson

  • 1Department of Linguistics, Northwestern University, 2016 Sheridan Road, Evanston, IL 60208, USA. matt-goldrick@northwestern.edu

Cognition
|December 22, 2007
PubMed
Summary
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Speech processing speed is influenced by sound sequence frequency, not just phonetic ease. This study shows that phonotactic probability impacts speech production independently of articulation complexity.

Area of Science:

  • Psycholinguistics
  • Speech Production
  • Phonetics

Background:

  • Speakers process frequent and phonetically simple sound sequences more efficiently.
  • Distinguishing the independent effects of frequency and complexity on speech production is challenging due to their natural correlation.

Purpose of the Study:

  • To investigate whether speech production is more influenced by the frequency or phonetic complexity of sound sequences.
  • To de-correlate frequency and complexity using novel phonotactic constraints.

Main Methods:

  • Participants were exposed to artificial languages with controlled phonotactic probabilities.
  • The study manipulated the frequency of specific sound sequences while keeping phonetic complexity constant.
  • Behavioral responses were analyzed to assess sensitivity to frequency variations.

Related Experiment Videos

Main Results:

  • Participant behavior demonstrated sensitivity to changes in frequency.
  • Phonotactic probability was shown to influence speech production.
  • This influence occurred independently of phonetic complexity.

Conclusions:

  • Phonotactic probability plays a significant role in speech production.
  • Speech production is modulated by the statistical regularities (frequency) of sound sequences, separate from articulation ease.