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20 Cards in this Set

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What is a Grammatical Morpheme?
A morpheme that adds to the grammatical structure of the word or phrase, including the 14 free and bound morphemes Brown studied
Early Stage I
Age: 19-22 months
Grammatical Morpheme:
Occasional Use
Late Stage I
Early Stage II
Age: 23-26 months
Grammatical Morpheme:
Occasional Use
Stage II
Age: 27-30
Grammatical Morpheme:
1. present progressive verb -ing
2. regular plural -s
3. preposition "in"
Stage III
Age: 31-34 months
Grammatical Morpheme:
1. preposition "on"
2. possessive -s
Early Stage IV
Age: 35-38 months
Grammatical Morpheme:
1. preposition "on"
2. possessive -s
Late Stage IV
Early Stage V
Age: 39-42 months
Grammatical Morpheme:
No others mastered at this age
Late Stage V
Age: 43-46 months:
Grammatical Morpheme:
6. regular past tense of verb -ed
7. irregular past tense of verb
8. regular 3rd person singular present tense -s
9.definite & indefinite articles
10. contractible copula
Stage V+
Age: 47-50 months
Grammatical Morpheme:
11. contractible auxiliary
12. uncontractible copula
13. uncontractible auxiliary
14. irregular 3rd person singular
Stage V++
Age: 51-67 months
All Grammatical Morphemes aquired
Early Stage I
Age: 19-22 months
MLU: 1.01-1.49
Late Stage I
Early Stage II
Age: 23-26 months
MLU: 1.50-1.99
Stage II
Age: 27-30 months
MLU: 2.00-2.49
Stage III
Age: 31-34 months
MLU: 2.50- 2.99
Early Stage IV
Age: 35-38 months
MLU: 3.00-3.49
Late Stage IV
Early Stage V
Age: 39-42 months
MLU: 3.50-3.99
Late Stage V
Age: 43-46 months
MLU: 4.00-4.49
Stage V+
Age: 47-50 months
MLU: 4.50-4.99
Stage V++
Age: 51-67 months
MLU: 5.00-5.99
What is MLU?
MLU stands for Mean Length of Utterance which is the average number of morphemes per utterance