Later speech Production

Protowords

Invent their own referential words that don't resemble any real adult word sounds

First words

Contain small inventory of sounds (m.b,d) and have very simple structure ( single syllables or reduplicated syllables

Sensitivity to mispronunciation

Understand what words sound like properly before they can say them

Production more consistent

By 18 months but still not adult like

Motor difficulties

Trouble moving vocal tract properly so they replace sound with another that's easier to pronounce

System of phonological processes

Substitution, cluster simplification, reduplication, deletion of final consonants & near syllables

Phonological processes

Systematic alterations to process affords

Place assimilation

When more than 2 consonants together, change the articulation to match the other

Segmentation problem

Take continuous stream of speech and break it up

Jusczyk & aslin

7.5 month old infants preferred to listen to familiarized words