Originally Posted by m@T
Fab - when bringing a child up in two languages from a young age, does the child tend to have a narrower working vocabulary in both languages than their monolingual classmates?
I have seen several studies, some suggest there is no difference, children learn the same amount of words, but in each language. Other studies suggest they are slightly behind in language acquisition until age 6, then catch up.
My own experience has been that, when counting the amount of words of vocabulary he was supposed to know at different ages, he was on target in French. As for English, my guess is he was probably on target as well, but I never counted.
All that said, there are other differences that come into play, boy versus girl, family environment, how reinforced each language is, etc.
On a slightly different subject, I have seen several studies that seemed to prove that children growing up bilingual scored better in all areas (math, physics, history, etc.) than monolingual children.