CSDI 3050 Case Study 1

Substitution Patterns that Disappear by age 3

Fronting, Affrication, & Stopping

Assimilation Patterns that Disappear by age 3

Consonant Assimilation, Denasalization, & Final Consonant Devocing

Syllable Structure Patterns that Disappear by age 3

Final Consonant Deletion, Reduplication, & Diminutization

Substitution Patterns that Disappear by age 4

Deaffrication & Stopping

Syllable Structure Patterns that Disappear by age 4

Cluster Reduction & Weak Syllable Deletion

Substitution Patterns that Disappear by age 5

Depalatalization, Alveolarization, & Stopping

Syllable Structure Patterns that Disappear by age 5

Cluster Reduction

Substitution Patterns that Disappear by age 6

Gliding & Labialization

Assimilation Patterns that Disappear by age 6

Prevocalic Voicing

Syllable Structure Patterns that Disappear by age 6

Epenthesis (by age 8)

Syllable Structure Patterns: Final Consonant Deletion Disappear by age 3

[bu] for books

[ca] for cat

[bo] for boat

[mo] for mop

Syllable Structure Patterns: Cluster Reduction/Simplification/Deletion Disappear by age 4/5

[top] for stop

Syllable Structure Patterns: Unstressed Syllable Deletion

[medo] for tomato

Syllable Structure Patterns: Reduplication (doubling) Disappear by age 3

[wawa] for water

Syllable Structure Patterns: Epenthesis (insertion of an unstressed vowel) Disappear by age 6

[səpun] for spoon

Syllable Structure Patterns: Diminutization addition of /I/ Disappear by age 3

[doggy] for dog

Substitution Patterns: Stopping (stops for fricatives or affricates; s/z & f/v) Disappear by age 3/4/5

[tun] for sun

[tock] for sock

Substitution Patterns: Liquid Gliding (a glide for a liquid) Disappear by age 6

[wæbit] for rabbit

Substitution Patterns: Vocalization (a vowel for a syllabic liquid)

[pepo] for paper

Substitution Patterns: Depalatalization (an alveolar fricative for a palatal fricative) Disappear by age 5

[fis] for fish

Substitution Patterns: Velar Fronting (alveolars for velars) Disappear by age 3

[rin] for ring

[tage/dage/sage] for cage

[tum/dum/sum] for gum

[sot/sod/sos] for sock

Substitution Patterns: Deaffrication (fricatives for affricates) Disappear by age 4

[ʃɛr] for chair

Assimilation Patterns: Labial Assimilation (a non-labial consonant is changed into a labial)

[bʊb] for book

Assimilation Patterns: Velar Assimilation (a non-velar is changed into a velar)

[kʌg] for cup

Assimilation Patterns: Nasal Assimilation (a non-nasal is changed into a nasal)

[mam] for mop

Assimilation Patterns: Voicing Assimilation (a voiceless is changed to a voiced)

[dɛn] for ten; a voiced sound is changed to a voiceless sound [pit] for pig

Assimilation Patterns: Alveolar Assimilation (a non-alveolar becomes an alveolar)

[dod] for dog

Ages 2-3

[p, b, m, n, d, h, w, t, k, g, f, j, ŋ]

Age 4

[v, ʧ, ʤ, l, s, z, ʃ]

Ages 5-6

[θ, ð, r, ӡ]

Consonant Cluster Reduction Age-appropriate for 3.5 year old

[bu/lu] for blue

[sunk/kunk] for skunk

[geen/reen] for green

Weak Syllable Deletion Age-appropriate for 3.5 year old

Dinsaur for dinosaur

Lemanade for lemonade

What processes should be suppressed by age 3.5?

Final Consent Deletion, Velar Fronting, Stopping