This document discusses key topics in first language acquisition, including:
1. Theories of language acquisition such as behaviorism, innatism, and interactionism. Innatism posits an innate language acquisition device while interactionism emphasizes social interaction.
2. Developmental stages of language acquisition from babbling to two-word sentences to complex grammar. Milestones include understanding language before production.
3. Experiments like the "WUG test" that show children internalize rules like plural formation without being taught.
4. Theories of bilingual acquisition including additive bilingualism, which has cognitive benefits over subtractive bilingualism.
The document examines issues in defining competence versus performance and the