Linguist: Some people have understood certain studies as showing that bilingual children have a reduced "conceptual map" because bilingualism overstresses the child's linguistic capacities. ██████████ █████ █████ ██ █████████ ████████ ██████ ██ ████ ████ █████ ████████ ████ ██ ████ █ ███████ ██████████ ████ ██ ████ ████████ ██ ███ ████ ███ ██████ ███ █████ ███████ ███ ██████ ███████ █████ ███ █████ ████ █████ ██ ████ ███ █████████ █████████████ █████ ████████ ████ ███ ████████ █████ █████████ █ █████ ███████ ████ █ ████ ████ ████ ███ ██ █████ ███ ██████████
The linguist looks to certain studies purporting to show that bilingual children tend to have a smaller vocabulary and concludes that these studies are deeply flawed. As evidence, the linguist states that vocabulary tests were only given in one language. Dual-language tests show children often expressed a given concept with a word from only one of their two languages.
The linguist shows that the studies are deeply flawed by pointing out a significant error in their methodology. If the children were given tests in only one language, then the tests are flawed because dual-language tests show children often express concepts with words from only one of their two languages.
The linguist's argument proceeds by
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