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Child-Directed Speech

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Evidence · no claims cited

Description

Child-directed speech (sometimes called "parentese" or, informally, "baby talk") is a near-universal pattern adults adopt when addressing infants and toddlers: exaggerated vowel and consonant sounds, higher pitch, slower pace, and heightened facial expression relative to adult-directed speech. It increases infant attention and engagement, and helps infants more clearly perceive the phonemic boundaries of the language(s) around them. It also establishes an early reciprocal turn-taking rhythm between speaker and listener that anticipates conversational structure well before the infant can speak.

Infants begin life able to discriminate the phonemes of any human language, but by around 10 months this discrimination narrows to the phonemes actually present in their ambient language(s); contrasts not used in the ambient language(s) come to be treated as equivalent. Because this narrowing happens early and is influenced by the speech infants actually hear, child-directed speech during this window plausibly supports the phoneme discrimination that later underlies clear speech perception and production.

Design Implications

Context

Requirements

  • A responsive adult actually interacting with the infant — child-directed speech from a live, attentive speaker, not passive media exposure, is what the evidence supports
  • An infant who is awake, alert, and available to attend to the interaction

Constraints

  • Prolonged, overly simplified speech beyond the toddler years can delay exposure to more complex, age-appropriate vocabulary and syntax if it isn't gradually withdrawn as the child's own language develops
  • Recorded media using exaggerated, child-directed-style speech (children's television, videos) does not substitute for responsive live interaction — the research support is specifically for reciprocal, adult-attentive speech

Target Learners

  • Infants (birth–12 months) during early phoneme discrimination and babbling
  • Toddlers (12–36 months) during early receptive and productive vocabulary growth
  • Infants and toddlers in multilingual homes, to support phoneme discrimination across more than one ambient language

Target Learning Goals

  • Phoneme discrimination within the ambient language(s)
  • Early attention to and engagement with a speaking partner
  • Foundational turn-taking patterns that later support conversational exchange

Affordances

Claims

Examples

Key Sources

  • Werker, J. F., & Tees, R. C. (1984). Cross-language speech perception: Evidence for perceptual reorganization during the first year of life. Infant Behavior and Development, 7, 49-63.
  • Werker, J. F., & Lalonde, C. E. (1988). Cross-linguistic speech perception: Initial capabilities and developmental change. Developmental Psychology, 24, 672-683.
  • Werker, J. F., Pegg, J. E., & McLeod, A. J. (1994). Cross-language speech perception: Initial capabilities and developmental change. Developmental Psychology, 30, 702-721.
  • Arduini-Van Hoose, N. (2020). Language development. In Educational psychology. Retrieved from https://edpsych.pressbooks.sunycreate.cloud. CC BY-NC-SA 4.0.
Page metadata
Field Value
type element
id child-directed-speech
title Child-Directed Speech
description Child-directed speech — exaggerated pitch, careful articulation, and simplified structure used when speaking with infants and toddlers — increases infant attention and supports early phoneme discrimination.
status review
canonical True
generated by claude/unspecified on 2026-08-29
trust unverified — no one has confirmed this page's content

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