The fundamental difference hypothesis (FDH), as formulated by Bley-Vroman (1990), claims that SLA tends to be nonconvergent because domain-specific linguistic mechanisms available in early childhood cannot be used for language learning in adulthood: Instead, second language (L2) learners deploy domain-general problem solving skills. I claim that…

Examination of a second grade additive-bilingual (Spanish-immersion) classroom, compared to a monolingual classroom for nonverbal problem-solving and native-language development, found significant differences in problem solving in favor of the bilingual class and no significant differences in native-language development. (46 references) (Author/CB)