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Related Experiment Video

Updated: Jul 19, 2026

Defining the Role Of Language in Infants' Object Categorization with Eye-tracking Paradigms
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Defining the Role Of Language in Infants' Object Categorization with Eye-tracking Paradigms

Published on: February 8, 2019

Infant word segmentation revisited: edge alignment facilitates target extraction.

Amanda Seidl1, Elizabeth K Johnson

  • 1Department of Speech, Language and Hearing Sciences, Purdue University, W. Lafayette, IN 47906, USA. aseidl@purdue.edu

Developmental Science
|October 25, 2006
PubMed
Summary

Infants segment words more easily from the beginning or end of sentences than from the middle. This finding sheds light on early word segmentation development in babies.

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Area of Science:

  • Developmental Psychology
  • Linguistics
  • Cognitive Science

Background:

  • Infants can segment words from continuous speech by 7.5 months.
  • Previous research established early word segmentation abilities.

Purpose of the Study:

  • To investigate if infants segment words from utterance edges more readily than from the middle.
  • To compare segmentation of initial versus final word positions.

Main Methods:

  • Utilized a procedure similar to Jusczyk and Aslin (1995).
  • Controlled target word location (edge vs. middle) within utterances.
  • Reduced familiarization time to prevent ceiling effects.

Main Results:

  • Infants demonstrated significantly better word segmentation from utterance edges compared to the middle.

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Last Updated: Jul 19, 2026

Defining the Role Of Language in Infants' Object Categorization with Eye-tracking Paradigms
07:31

Defining the Role Of Language in Infants' Object Categorization with Eye-tracking Paradigms

Published on: February 8, 2019

Exploring Infant Sensitivity to Visual Language using Eye Tracking and the Preferential Looking Paradigm
06:07

Exploring Infant Sensitivity to Visual Language using Eye Tracking and the Preferential Looking Paradigm

Published on: May 15, 2019

  • Segmentation of words in final utterance position was as effective as in initial position.

    • Conclusions:

    • Infant word segmentation is biased towards utterance boundaries.
    • Findings contribute to understanding the developmental trajectory of word segmentation in infants.
    • Results inform models of early language acquisition and processing.