Identifying specific language impairment (SLI) in bilingual children represents a clinical challenge because of similarities in language behavior between child second language learners and monolinguals with SLI and because of the lack of standardized language tests on bilingual children. This study investigated the relevance of a LITMUS (Language…

In this article I provide evidence that despite frequently cited differences between child first language (L1) and adult second language (L2) speakers in overt behavior (performance) during grammatical development, the nature, source, and limits of implicit knowledge (competence) in native and second language grammars are equivalent (i.e., they…