Persistent Neurobehavioral Markers of Developmental Morphosyntax Errors in Adults

Purpose Child language acquisition is marked by an optional infinitive period (ages 2–4 years) during which children use nonfinite (infinitival) verb forms and finite verb forms interchangeably in grammatical contexts that require finite forms. In English, children's errors include omissions of past tense /– ed / and 3rd-person singular /– s /. This language acquisition period typically ends by the age of 4 years, but it persists in children...