"A gradualist view of word meaning", Plenary, International Workshop on Word Meaning, Concepts, and Communication, September 2005
"A positive source for negative evidence", Department of Philosophy, Kings College, January 2006
"Acquiring word meanings", MPI for Evolutionary Anthropology, Leipzig, February 2006
"Antecedents to conventional plural marking in language acquisition", Linguistics Circle, Department of Linguistics & English Language, University of Edinburgh, February 2006
"Speaker perspective and lexical choice in children's word acquisition", Department of Psychology, Oxford University, March 2006
"L'acquisition de la signification chez l'enfant", Groupe-CNRS, Université de Poitiers, March 2006
"Early stages in the acquisition of meaning", MPI for Psycholinguistics, Nijmegen, April 2006
"On the acquisition of word-meaning", Research Centre for English & Applied Linguistics, Cambridge University, May 2006
"Interactions adultes-enfants et l'acquisition du langage", Keynote, Ecole-CNRS: Mutualisation des ressources (outils & données), Moissac, May 2006
"La répétition dans la conversation: Quels roles joue-t-elle?", Journée d'Etudes: Lexique et morphologie - Premières acquisitions, Université de Paris 3 - Sorbonne Nouvelle, May 2006
"First steps in the acquisition of meaning", Keynote, Child Language Seminar, University of Newcastle-upon-Tyne, July 2006
"One vs. more-than-one: Antecedents to plural marking in acquisition," Cognitive Science Program, University of Arizona, February 2007
"Speaker intentions and the identification of referents," Symposium on Children's Understanding of the Mind and its Influence on Pragmatic Language Development, Biennial Meeting of the Society for Research on Child Development, Boston, April 2007
"Les adultes comme source des connaissances linguistiques des enfants," 3e Colloque sur Constructivisme et Education, SRED Geneva, September 2007
"Coventionality in language use and language acquisition", Conventionality across domains in cognitive development – Preconference, International Conference on Infant Studies, Vancouver, March 2008
"Attention and information in adult-child exchanges", MPI for Psycholinguistics, Nijmegen, NL, April 2008
"Repeats and ratification in the process of acquisition", Language, communication, and Cognition, Brighton, August 2008.