My research is concerned with the cognitive processes of language, and specifically with those engaged when humans speak (as opposed to when they comprehend language). I investigate the way in which humans cognitively develop intentions of what they are trying to say, the way in which words are organised in and retrieved from a mental lexicon for the purpose of the utterance, and the processes involved in generating the appropriate articulation. Much of my work is based on behavioural studies; however, I have also been involved in neuroimaging research, and in studies of acquired brain damage. Other interests of mine include numerical cognition, and processing in the absence of conscious awareness.