C_S_D 4320 Lecture Notes - Lecture 7: Vocal Tract, Grey Matter, The Foundations
Document Summary
Speech sound acquisition in infancy, continued 2. Birth to school age: 4 phases of speech acquisition. Phase 1: the foundations (birth to 1 year) Phase 2: transition from words to speech (1-2 years) Phase 3: growth of the inventory (2-5 years) Phase 4: mastery of speech and literacy (5+ years: phase 1: the foundations (birth to 1 year) Increased precision & control of articulatory movements: lip, jaw, and tongue. Pure tone awareness of low frequency sounds at 16 weeks ga. Recognition of nursery rhymes 3 weeks before birth: mothers recite rhymes 3x/day x 4wks, from 33 to. 37 weeks ga: infants show change in hr to familiar rhyme. Prefer mothers voice to strangers at 3 days old: /d/-/g/ contrast at 2 months. Warning signs of difficulty in late babbling: phase 2: transition from words to speech (1-2 years) Common phonological processes (final c deletion, cluster reduction. Initial > final: phase 3: growth of the inventory (2-5 years)
