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Related Experiment Video

Updated: Dec 14, 2025

Infant Auditory Processing and Event-related Brain Oscillations

Infant Auditory Processing and Event-related Brain Oscillations

Published on: July 1, 2015

Word Level Stress and Lexical Processing in 17-Month-Old Infants.

Jennifer Campbell¹, Susan Graham², Suzanne Curtin²

¹Department of Psychology, The University of British Columbia.

Infancy : the Official Journal of the International Society on Infant Studies

|July 18, 2020

Summary

Seventeen-month-old infants process familiar words differently when their stress patterns are altered. Infants show slower recognition and unreliable mapping when word stress is incorrect, indicating developing knowledge of stress

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Published on: April 19, 2017

Area of Science:

Developmental Psychology
Psycholinguistics
Cognitive Science

Background:

Infants' ability to distinguish and recognize words is crucial for language acquisition.
Detailed word representations aid infants in learning new vocabulary.
The role of prosodic features like word stress in early language development is not fully understood.

Purpose of the Study:

To investigate whether 17-month-old infants encode word stress in their representations of familiar words.
To determine if infants recognize that altering stress in English words does not typically change their meaning.

Main Methods:

Experiment 1: Infants heard correctly and incorrectly stressed familiar labels for familiar objects, measuring fixation times.
Experiment 2: Infants were presented with correctly and incorrectly stressed familiar words alongside familiar and novel objects, assessing referential mapping.

Main Results:

Infants were slower to identify objects with mis-stressed familiar labels.
Infants reliably mapped correctly stressed familiar words to their referents but failed to do so with mis-stressed words.

Conclusions:

Word stress influences the processing of familiar words in 17-month-old infants.
Infants are developing an understanding that stress alterations in familiar English words do not signal new meanings.