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Schmitt, L. (2013). Language Acquisition Device. In: Volkmar, F.R. (eds) Encyclopedia of Autism Spectrum Disorders. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-1698-3_348

Irving B. Harris Professor of Child Psychiatry, Pediatrics and Psychology Yale University School of Medicine, Chief, Child Psychiatry Children's Hospital at Yale-New Haven Child Study Center, New Haven, CT, USA

The Language Acquisition Device, or LAD, was proposed by psycholinguist Noam Chomsky as the device or organ within the brain which houses human’s innate ability to acquire and produce language. Stemming from the nativist theory which asserts that certain skills innately exist in humans, the LAD is thus in direct opposition with the behaviorist theory which suggests skills are attained through learning and reinforcement. According to Chomsky, the LAD is held responsible for allowing children to derive syntactic structure and rules from their native language through multiple stages of hypothesis testing. Through this process, the LAD transforms generalizations of speech and language into basic grammar. This hypothetical structure helps explain the immense surge in language ability in toddlerhood, but it is unavailable after an unspecified critical period of development.