Articulating What Infants Attune to in Native Speech

Area of Science:

• Linguistics
• Developmental Psychology
• Speech Science

Background:

• Infant language acquisition involves both speech perception and production, typically studied separately.
• Current models assume separate acoustic (perception) and motor (production) information processing.
• This creates a challenge for understanding how infants link what they hear to what they say.

Purpose of the Study:

• To propose a unified framework for speech perception and production in infants.
• To challenge the acoustic vs. motor dichotomy, positing articulatory information as primary.
• To explain the rapid attunement to native language phonology.

Main Methods:

• Integrating principles from the Perceptual Assimilation Model (PAM) and Articulatory Phonology (AP).
• Focusing on articulatory gestures as the fundamental units of speech.
• Reviewing existing research on infant speech discrimination, imitation, and multimodal perception.

Main Results:

• Infants attune to native language articulatory patterns, assimilating non-native sounds based on articulatory similarity.
• Articulatory Phonology provides a discrete, contrastive system based on organ gestures and constriction locations/degrees.
• Evidence suggests infants perceive and utilize articulatory information to guide vocal production.

Conclusions:

• Articulatory information, not acoustic or motor patterns, forms the basis for integrating speech perception and production in infants.
• This articulatory foundation explains the developmental integrality of speech perception and production.
• The proposed PAM and AP integrated framework offers a parsimonious explanation for early language acquisition.