

Since 2010, Radford has researched the syntax of colloquial English, using data recorded from unscripted radio and TV broadcasts. In the 1990s, Radford was a pioneer of the maturation-based structure building model of child language, and the acquisition of functional categories in early child English within the Principles and Parameters framework, in which children are seen as gradually building up more and more complex structures, with lexical categories (like noun and verb) being acquired before functional- syntactic categories (like determiner and complementiser): this research resulted in the publication of a monograph on Syntactic Theory and the Acquisition of English Syntax in 1990, and numerous articles on the acquisition of syntax by monolingual, bilingual and language-disordered children. Pieter Seuren: a research fellow at the Max Planck Institute for Psycholinguistics at Nijmegen University of Cambridge, University of Oxford, University of East Anglia, University College of North Wales, University of Essex Generative grammar, syntax, child language acquisition Generative grammar, Principles and Parameters of language development, structure building model of child language acquisition
