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Related Concept Videos

Language Development01:22

Language Development

Children master language quickly and with relative ease, supported by both biological predisposition and reinforcement. B. F. Skinner (1957) proposed that language is learned through reinforcement, while Noam Chomsky (1965) argued that language acquisition mechanisms are biologically determined.
The critical period for language acquisition suggests that the ability to acquire language is at its peak early in life. As people age, this proficiency decreases. Language development begins very...

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Related Experiment Video

Updated: Jun 25, 2026

Infant Auditory Processing and Event-related Brain Oscillations
06:34

Infant Auditory Processing and Event-related Brain Oscillations

Published on: July 1, 2015

Some consequences of stimulus variability on speech processing by 2-month-old infants.

P W Jusczyk1, D B Pisoni, J Mullennix

  • 1Department of Psychology, State University of New York, Buffalo 14260.

Cognition
|June 1, 1992
PubMed
Summary
This summary is machine-generated.

Infant speech perception is robust to talker variability for immediate sound discrimination but impaired for memory. Reducing variability aids gender but not phonetic memory in 2-month-olds.

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Area of Science:

  • Developmental Psychology
  • Speech Perception
  • Infant Cognition

Background:

  • Infants' ability to learn speech sounds is crucial for language acquisition.
  • Understanding how stimulus variability affects early speech processing is key.

Purpose of the Study:

  • To investigate the impact of talker variability on 2-month-old infants' perception and memory of speech sounds.
  • To determine if variability affects immediate discrimination versus delayed recall.

Main Methods:

  • Utilized the high-amplitude sucking (HAS) procedure to assess infant responses.
  • Manipulated talker variability (single vs. multiple talkers) and delay intervals (immediate vs. 2-minute).
  • Tested discrimination of syllables and recognition of talker gender.

Main Results:

  • Infants detected syllable changes equally well with single or multiple talkers immediately.
  • Talker variability hindered speech sound memory after a 2-minute delay.
  • Reducing talker variability allowed infants to recognize gender changes but not phonetic details after a delay.

Conclusions:

  • Infant speech perception is adaptable to talker variability for immediate discrimination.
  • Talker variability negatively impacts memory encoding for speech sounds in early infancy.
  • Limited variability aids retention of broader acoustic cues like talker gender, but not fine phonetic distinctions.