Definition:
Native language acquisition (also called first language acquisition or L1 acquisition) is the process by which children naturally acquire the language(s) of their environment without formal instruction. Unlike second language acquisition, which typically involves conscious effort and occurs after childhood, native language acquisition is universal, largely unconscious, and proceeds through predictable developmental stages regardless of the specific language being acquired.
In-Depth Explanation
Universal Developmental Stages
Despite enormous variation in languages and cultures, children worldwide follow remarkably similar stages:
- Cooing and babbling (0-12 months): Infants produce vowel-like sounds, then consonant-vowel combinations. By 10 months, babbling begins to reflect the phonological patterns of the ambient language.
- One-word stage (12-18 months): First recognizable words appear (“mama,” “ball,” “no”). Children use single words to express whole propositions (holophrastic speech).
- Two-word stage (18-24 months): Telegraphic combinations emerge (“more milk,” “daddy go”), reflecting basic semantic relations.
- Multi-word stage (24-36 months): Rapid grammatical development — morpheme acquisition order follows predictable patterns (present progressive -ing before past tense -ed in English).
- Complex syntax (3-5 years): Relative clauses, embedded sentences, and increasingly adult-like structures emerge.
- Refinement (5+ years): Vocabulary continues expanding; pragmatic competence, literacy, and metalinguistic awareness develop.
Theoretical Perspectives
The mechanism behind L1 acquisition is one of the most debated questions in linguistics:
- Nativist (Noam Chomsky): Children are born with an innate Language Acquisition Device and Universal Grammar — the input merely triggers parameter setting
- Usage-based (Tomasello): Children learn language from input through general cognitive mechanisms — pattern extraction, analogy, and social learning — without innate linguistic knowledge
- Interactionist: Both innate capacities and environmental input are necessary — caretaker speech and social interaction shape development
Relevance to SLA
The comparison between L1 and L2 acquisition is a foundational question in SLA:
- Does the Critical Period Hypothesis mean adults cannot access the same mechanisms?
- Is Krashen’s acquisition-learning distinction — unconscious acquisition vs. conscious learning — analogous to the L1/L2 divide?
- Can adult L2 immersion replicate L1-like acquisition? (See immersion, AJATT)
Key Researchers
- Noam Chomsky — Universal Grammar and the poverty of the stimulus argument
- Michael Tomasello — Usage-based alternative to nativism
- Roger Brown — Pioneering longitudinal studies of children’s morpheme acquisition