Bilingualism in SLP: state of the science - Bilingualism in childhood - Simultaneous bilingual speech and language acquisition

6 important questions on Bilingualism in SLP: state of the science - Bilingualism in childhood - Simultaneous bilingual speech and language acquisition

Is there one common or two seperate languages system?

- At the moment: dual language system hypothesis
- But they're not "closed off" from each other. There is a link (fonological,...) => Interactive dual language systems

Give the in sum: developmental trajectory 4 stages + example

1. Prelingual < 1j Babbling, Languages specific, but interaction
2. Early lingual stage 1j - 2.6j
*  1j - 1.6j one word utterances
*  1.6j - 2.6j two word utterances
3. Differentiation stage 2.6j - 5j Multiword utterances
4. Completion stage < 5 j   Multiword utterances

Same milestones MO -> Inter-individual differences!

What is the phonological development with an simultaneous bilingual child?

- Research inconclusive
- Variations: ex similar (1 language) / dissimilar (2 languages babbling patterns
- Differences: ex  delayed vs similar vs accelerated sound acquisition rate
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What is the grammatical development with an simultaneous bilingual child?

- Seperate but interconnected grammatical systems -> cross-linguistic transfer
- Variatons among BI
- Differences ex more periphrasic possesive forms in BI

What is the lexical development with an simultaneous bilingual child?

- Variations ex BI don't have similar exposure to different languages -> new words learned in context.
- Differences ex BI initially fewer words per languages but -> with suffucient input -> no differences.

What is the conclusion of simultaneous speech and language acquisition?

- In sum: simultaneous BI children achieve the same fundamental milestones in language development (phonology/grammar/lexicon) as MO children with the same frame.
- Inter-individual differences
* Heterogeneity simultaneous BI children
* Spectrum language pairs under investigation
* Sociatal and cultural factors
* BI child's socialization process

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