Articulation Developmental Norms Chart

AGE OF TYPICAL ACQUISITION

CONSONANT SOUNDS

EXAMPLE

Age 5

prevocalic or consonantal /r/

 red

6-7 years

vocalic /r/

 Ernie

 Orville

8 years

pr

br

tr

dr

 kr

 gr

 fr

 prize

 braid

 truck

 dry

creep

great

fry

9 years

thr

spr

 str

 skr

 thread

 spread

string

scrape

SOUND

EXPECTED AGE OF MASTERY

COMMON ERROR

prevocalic /r/

5 years

gliding w/r

wed for red

prevocalic /r/

not developmental

substitution of v for /r/

ved for red

vocalic /r/

5 years

vowelization

ca for car

initial /r/ blends

8 & 9 years

cluster reduction ti for tree

Gliding:  Bw for bread