Marc E. Lavoie, PhD is currently research professor of Psychiatry and Neuroscience at the University of Montréal, and since 2001 he is directing the Cognitive and Social Psychophysiology Laboratory, at the research center of the Institut Universitaire en Santé Mentale de Montréal (Canada). His research training was completed in the field of psychophysics (Université de Moncton, Canada), experimental neuropsychology (Université de Montréal, Canada), developmental psychology (Universiteit van Amsterdam, the Nederland) and in psychobiology (Université de Lille, France). He directs a clinical research program currently funded by the Canadian Institutes of Health Research that addresses crucial issues about the relationship between brain functions, behavior, and cognition in various neurodevelopmental and habit disorders, primarily in Tourette syndrome and body-focused repetitive behaviour. He is member of the International Organization of Psychophysiology.