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English Second-Language Input and Vocabulary Development in Bilingual Autistic and Neurotypical Children: To What
Johanne Paradis1, Tamara Sorenson Duncan2
1Department of Linguistics, University of Alberta, Edmonton, Canada.
Autistic bilingual children
Area of Science:
- Developmental Psychology
- Linguistics
- Neurodevelopmental Disorders
Background:
- Autistic children exhibit varied language skills.
- Bilingual neurotypical children's second language (L2) acquisition is influenced by factors like L2 input.
- Understanding L2 vocabulary development in autistic bilinguals is crucial.
Purpose of the Study:
- To compare L2 vocabulary development in autistic and neurotypical bilingual children.
- To investigate the role of cumulative L2 input on L2 vocabulary.
- To determine if autistic children form a distinct group regarding L2 vocabulary.
Main Methods:
- Compared 23 autistic and 26 neurotypical bilingual children (ages 4;7-9;6).
- Assessed receptive vocabulary and expressive lexical measures (word tokens/types, internal state terms).
- Utilized linear regression and hierarchical cluster analysis.
Main Results:
- Autistic children generally scored lower on vocabulary measures.
- Increased L2 input correlated with higher vocabulary scores in both groups.
- Cluster analysis revealed overlapping abilities in most children, but one cluster of autistic children showed very low vocabulary despite high L2 input.
Conclusions:
- Autistic bilingual children are not a homogeneous group distinct from neurotypical peers.
- Only a subset of autistic bilinguals demonstrated unique L2 profiles.
- L2 vocabulary development in autistic children is complex and influenced by individual factors and L2 exposure.
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