13616. SIMULTANEOUS BILINGUAL LANGUAGE DEVELOPMENT. This paper provides an overview and analysis of simultaneous bilingual language development. Following an overview of current theories of bilingualism and second language acquisition as they apply to simultaneous bilingualism and language development, the analysis focuses closely on issues of bilingualism and child developmental issues. To this end, particular attention is devoted to the major contoversies in the bilingual literature: 1) unitary-versus dual-lexicon theories of bilingual development; 2) the period of language differenciation; 3) mixed languages; and 4) code-switching. A concluding section examines the implications of this research on simultaneous bilingualism for the discipline of speech language pathology. 27 pages, 79 footnotes, 34 bibliographic sources.