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Beating the bounds: Localized timing cues to word segmentation.

Laurence White¹, Sven L Mattys², Linda Stefansdottir³

¹School of Psychology, Plymouth University, Drake Circus, Plymouth PL4 8AA, United Kingdom.

The Journal of the Acoustical Society of America

|September 3, 2015

Summary

Listeners better segment speech using consonant lengthening at word beginnings. Lengthening vowels or consonants word-medially hinders speech segmentation and learning, highlighting the importance of consonant duration for speech perception.

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Area of Science:

Psycholinguistics
Speech Perception
Auditory Learning

Background:

Prosody aids speech segmentation into words and phrases.
Vowel lengthening signals upcoming speech boundaries.
Consonant lengthening's role in segmentation is less understood.

Purpose of the Study:

To investigate how consonant and vowel duration affects speech segmentation.
To determine if consonant lengthening aids in learning novel speech patterns.

Main Methods:

Artificial language learning experiments using trisyllabic structures.
Systematic manipulation of durational variations in word-initial consonants and vowels.
Comparison of recall rates across different lengthening conditions.

Main Results:

Word-initial consonant lengthening significantly improved recall of novel words.
Lengthening word-initial vowels or medial consonant-vowel sequences impaired learning.
Localization of durational cues is critical for effective speech segmentation.

Conclusions:

Consonant lengthening, particularly word-initially, serves as a robust cue for speech segmentation.
The structural interpretation of durational effects depends on cue localization (onset vs. rhyme).
Findings inform models of speech perception, predictive processing, and syllable timing.