Narrative review demonstrates how vocal motor schemes shape word learning in infants, suggesting babble patterns may serve as early indicators of language delay.
Key Points
To review the theoretical origin and fifteen years of experimental evidence supporting the articulatory filter hypothesis, evaluating how motor routines acquired through babbling shape infant speech perception and early word learning.
Synthesized findings from 15 years of experimental and acoustic research on canonical and pre-canonical infant speech development.
Evaluated studies tracking Vocal Motor Schemes (VMS)—frequent, stable consonantal sound patterns identified from naturalistic audio recordings—as an index of phonetic mastery.
Infants' established vocal motor schemes modulate their attention toward and memory retention for both novel nonwords and familiar words.
Earlier acquisition of vocal motor schemes significantly predicts stronger subsequent lexical and phonological outcomes.
Acoustic analyses validate the vocal motor scheme construct and show that infant vocal patterns influence perception during pre-canonical stages and heighten attention to self-produced speech.