Abstract

For more than 60 years, Chomsky has been an intellectual Colossus bestriding the worlds of language, philosophy, and the cognitive sciences, and focusing attention on the whole field and emphasizing the crucial importance of domains overlooked by the mainstream. One such area is the study of first‐language acquisition. This chapter considers “atypical acquisition” to cover two conceptually related situations. First, it covers a variety of cases where there is an obvious “poverty of the stimulus” in that children either receive or perceive no linguistic input at the essential early stages referred to as critical periods. Second, it covers where there is rather the opposite situation. The chapter presents atypicality in language acquisition that stems from the learner's atypical neurological profile rather than environmental or input properties. It focuses on Developmental Language Disorder, Autism Spectrum Disorder, and the case of the polyglot‐savant Christopher to exemplify atypical acquisition.