Brown's Stages Of Language Development

Question 1

II age and MLU

Answer 1

27-30 months 2.0-2.5

Question 2

III age and MLU

Answer 2

31-34 months 2.5-3.0

Question 3

IV age and MLU

Answer 3

35-40 months and 3.0-3.75 MLU

Question 4

V age and MLU

Answer 4

41-46 months and 3.75-4.5 MLU

Question 5

I milestones

Answer 5

Uses one-, two-, and three-word utterances; uses intonation to ask yes/no questions; uses limited Wh- questions

Question 6

II milestones

Answer 6

Begins to use grammatical morphemes, uses in and on

Question 7

III milestones

Answer 7

Increases in length do to use of auxiliaries, increases use of Wh- questions, uses interrogative reversals

Question 8

IV milestones

Answer 8

Uses object-noun-phrase complements (eg: my brother called my other brother something stupid), uses indirect or embedded Wh- questions (“What time is it?” vs “do you know what time it is?”)

Question 9

V milestones

Answer 9

Coordinates simple sentences

Question 10

V+ age and MLU

Answer 10

47+ months and 4.5+ MLU

Question 11

V+ milestones

Answer 11

Adds negative interrogatives; adds indefinite forms such as no one, and nobody; has some difficulty with double negatives

Question 12

I - age, MLU

Answer 12

12-26 months, 1.0 - 2.0