For 10 points, name this process in which a child develops into a fluent native speaker.
People undergoing this process form the largest part of a corpus established at Carnegie Mellon by Brian MacWhinney and Catherine Snow. Pullum and Scholz published a critical "empirical assessment" of a theory about this process, prompting an "empirical reÂ­assessment" in favor of that theory by Legate and Yang. People undergoing this process do not entertain incorrect hypotheses about phenomena such as auxiliaryÂ­fronting, a fact that inspires the (*) "poverty of the stimulus" argument about it. A feral child named Genie had not completed this process by age 13, suggesting that it is easiest during a "critical period" up to aboutage five. At the end of this process, children have successfully mastered both a grammar and a lexicon. For 10 points, name this process in which a child develops into a fluent native speaker.
People undergoing this process form the largest part of a corpus established at Carnegie Mellon by Brian MacWhinney and Catherine Snow.
first language acquisition [or learning a first language; or L1 acquisition; or word forms; do not accept "second language acquisition"]