Trevor A. Harley is Dean of Psychology and Chair of Cognitive Psychology at the University of Dundee, Scotland. He was an undergraduate at the University of Cambridge, where he was also a PhD student, completing a thesis on slips of the tongue and what they tell us about speech production. He moved to Dundee from the University of Warwick in 1996. His research interests include speech production, how we represent meaning, and the effects of aging on language.