Language Development and Age

The anecdotal view of language acquisition is that children learn language with apparent ease, no instruction and in very little time, while adults find learning a new language to be cognitively challenging, labour intensive and time-consuming. In this book Herschensohn examines whether early childhood is a critical period for language acquisition after which individuals cannot learn a language as native speakers. She argues that a first language is largely susceptible to age constraints, showing major deficits past the age of twelve. Second-language acquisition also shows age effects, but with a range of individual differences. The competence of expert adult learners, the unequal achievements of child learners of second languages, and the lack of consistent evidence for a maturational cut-off, all cast doubt on a critical period for second-language acquisition.

• Only current monograph to discuss a critical period for both first- and second-language acquisition
• Brings together evidence from a range of sources such as language pathology, pidgin and creole languages
• Includes a review of recent psycholinguistic and neurolinguistic research on early and late bilinguals