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Related Experiment Video

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Support for context effects on segmentation and segments depends on the context.

Christopher C Heffner1,2,3, Rochelle S Newman4,5, William J Idsardi4,6

  • 1Program in Neuroscience and Cognitive Science, University of Maryland, 1401 Marie Mount Hall, 7814 Regents Dr., College Park, MD, 20742, USA. heffner@umd.edu.

Attention, Perception & Psychophysics
|January 19, 2017
PubMed
Summary
This summary is machine-generated.

Speech rate adaptation impacts how we understand speech. This study shows that speech rate context, even far from ambiguous sounds (distal), significantly affects speech perception for both sounds and word boundaries.

Keywords:
PsycholinguisticsSpeech perceptionTemporal processing

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Area of Science:

  • Psycholinguistics
  • Auditory Perception
  • Speech Processing

Background:

  • Listeners adapt to varying speech rates.
  • Speech rate adaptation effects are stronger for proximal syllables than distal ones.
  • Previous research shows inconsistent effects of distal speech rate on word segmentation versus segmental perception.

Purpose of the Study:

  • To standardize methods for comparing distal speech rate effects across different types of speech ambiguity.
  • To investigate how different definitions of distal context influence adaptation.
  • To determine if proximal speech rate effects are comparable across ambiguity types.

Main Methods:

  • Created minimally different sentences ambiguous for consonant voicing or word boundary location.
  • Manipulated distal speech rate based on three definitions and proximal speech rate.
  • Assessed perception in both laboratory and online (Mechanical Turk) samples.

Main Results:

  • The definition of distal context significantly influenced adaptation effects for both segments and segmentation.
  • Distal speech rate effects on word-final segments were demonstrated for the first time.
  • Results were largely replicated in an online sample, with minor caveats for segment perception.

Conclusions:

  • Distal speech rate context plays a crucial role in speech perception, influencing both phonetic and lexical processing.
  • Standardized methods reveal the impact of distal context, challenging previous distinctions between segmentation and segmental perception studies.
  • The findings have implications for understanding speech processing and developing more robust speech technologies.