English Language Acquisition — LET Practice Questions

Stephen Krashen said we learn languages best when we hear or read messages that are slightly above our current level but still understandable, called 'comprehensible input' (i+1). The brain picks up grammar and vocabulary naturally from this meaningful input. The phrase 'comprehensible input' is the dead giveaway for Krashen's Input Hypothesis.

Tip: 'Comprehensible input' = Krashen's Input Hypothesis (i+1).

Noam Chomsky's Nativism (or Innateness Hypothesis) argues that humans are born with an innate capacity for language—a Language Acquisition Device (LAD) hardwired into the brain. This explains why children acquire complex grammar rules despite limited, messy input and why all healthy children across cultures reach similar milestones. Chomsky's theory challenged Behaviorism by showing that imitation and reinforcement alone can't explain how a three-year-old produces sentences she's never heard before. While neuroscience hasn't found a physical LAD, Nativism remains influential in linguistics. For language teachers, this theory suggests that student errors are part of natural development, not just bad habits, and that explicit grammar instruction works better than pure immersion.

Lev Vygotsky's Sociocultural Theory emphasizes that learning happens *through interaction with others*. The Zone of Proximal Development (ZPD) is the gap between what a child can do alone and what they can do with help from a more knowledgeable peer or teacher. In an English classroom, this means a student might struggle to write an essay alone but succeed with scaffolding—a teacher's guiding questions, peer feedback, or a model essay. Language isn't just internalized; it's co-constructed through dialogue. This theory underlies modern collaborative learning, peer review, and the importance of teacher feedback. For ESL teaching, it justifies pair work, group discussion, and teacher-guided writing conferences.