STAGES O

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STAGES OF FIRST LANGUAGE DEVELOPMENTAge Accomplishment Examples

0-2 months Crying (express hunger and discomfort)

2-4 months Cooing (express satisfaction or pleasure) aaa, ooo

4-9 monthsBabbling, gurgling, changing to echolalic babbling

gagaga, mamamama

9-18 months

One-word utterances; refer to people and objects in baby’s life

juice; mama

18 months—2 ½ years

Two-word utterances; the beginning of syntax, expanding to three-word utterances; allows for more communicative functions (commenting, negating, requesting, & questioning)

more juicejuice fall down

Daddy go?

2 ½ years —4 years

Telegraphic Stage (S-V-O): Expanded syntax and vocabulary; omit key grammatical markers and function words

I eated bread

DEVELOPMENTAL SEQUENCESStages are universal.

Year 1 – Involuntary crying when they are

hungry or uncomfortable Babbling and gurgling Can distinguish between sounds

DEVELOPMENTAL SEQUENCES

1 yr.

2 yrs.

STAGES OF LANGUAGE DEVELOPMENT

EMERGENCE AND DEVELOPMENT OF LANGUAGE FEATURES♣ Universal♣ Related to children’s cognitive

development♣ No temporal adverbs until they

develop a sense of time (tomorrow, last week)

STAGES OF ACQUISITION OF GRAMMATICAL MORPHEMES

Roger Brown et al. (1973) did a longitudinal study of three children –Adam, Eve and Sarah

Jill & Peter de Villiers (1973) confirmed it in a cross-sectional study of 21 children

STAGES OF ACQUISITION OF GRAMMATICAL MORPHEMES

Order of acquisition

1. Present progressive

2. Plural

3. Irregular past forms

4. Possessive

5. Copula

STAGES OF ACQUISITION OF GRAMMATICAL MORPHEMES

♣6. Articles ♣7. Regular past ♣8. Third person singular simple present ♣9. Auxiliary

EARLY SENTENCE PRODUCTION

When?

DEVELOPMENT OF SENTENCE PRODUCTION

STAGE I

Example Communicative Intent

DEVELOPMENT OF SENTENCE PRODUCTION

STAGE II

Form Example

DEVELOPMENT OF SENTENCE PRODUCTION

STAGE IIIForm Example

DEVELOPMENT OF SENTENCE PRODUCTION

STAGE IVForm Example

DEVELOPMENT OF SENTENCE PRODUCTION

STAGE VForm Example

CRITIC

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CRITICAL PERIOD HYPOTHESIS

Lenneberg

Some experiments:

Victor

Genie

CRITICAL PERIOD HYPOTHESIS

CRITICAL PERIOD HYPOTHESIS

THE END