Assessing vocabulary knowledge is an important part of establishing language proficiency in bilingual children. The crosslinguistic lexical tasks (CLTs) provide a framework for testing vocabulary development in three-to-six year-olds using a standard procedure and comparable items for multiple languages. This study describes the development of the…

Presents a theory that all developing and developed bilinguals have a preferred and a second language (L2) and that the bilingual increases L2 competence through fluctuating activity between bilingual preferred L2 medium-oriented communication and monolingual L2 message-oriented communication. Discusses implications of the theory for language…