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1.2 Introductory remarks and definitions

- Distinction between bilingual first language acquisition and early second language acquisition
- Chronological criterion:
-- McLaughlin (1978): within the first three years
-- Deuchar und Quay (2000): within the first year
-- Romaine (1999), De Houwer (2009), Müller et al. (2011): starting from birth
-- Time before birth?