Jean Decety

Jean Decety is an American–French neuroscientist specializing in developmental neuroscience, affective neuroscience, and social neuroscience. His research focuses on the psychological and neurobiological mechanisms underpinning social cognition, particularly social decision-making, empathy, moral reasoning, altruism, pro-social behavior, and more generally interpersonal relationships. He is Irving B. Harris Distinguished Service Professor at the University of Chicago.

Jean Decety obtained three advanced master's degrees in 1985 (neuroscience), in 1986 (cognitive psychology), and in 1987 (biomedical engineering science) and was awarded a Ph.D. in 1989 (neurobiology - medicine) from the Université Claude Bernard. After receiving his doctorate, he worked as a post-doctoral fellow at the hospital in Lund (Sweden) in the Department of Neurophysiology, then in the Karolinska Hospital, Stockholm (Sweden) in the Departments of Neurophysiology and Neuroradiology. He then joined the National Institute for Medical Research (INSERM) in Lyon (France) until 2001.

Decety is currently professor at the University of Chicago and the College, with appointments in the Department of Psychology, and in the Department of Psychiatry and Behavioral Neuroscience. He is the Director of the Social Cognitive Neuroscience Laboratory, and the Child NeuroSuite. Decety is a member of the Committee on Computational Neuroscience and the Center for Integrative Neuroscience and Neuroengineering. In 2022, Decety was elected as a member of the Academia Europaea, a pan-European Academy of Humanities, Letters, Law, and Sciences, in the Physiology and Neuroscience section.

Decety served as the founder and editor-in-chief of the journal Social Neuroscience between 2006 and 2012, and he is on the editorial boards of Development and Psychopathology, The European Journal of Neuroscience, The Scientific World Journal, Frontiers in Emotion Science, and Neuropsychologia. With his colleague John Cacioppo, Decety played an instrumental role in the creation of the Society for Social Neuroscience in 2010.

Mental simulation, also known as motor imagery, mental practice, or mental rehearsal, refers to the human cognitive ability to imagine doing a specific action or behavior and simulating the probable outcome before acting. It has been part of elite sports training for a long time. Olympians use imagery as mental training Research pioneered by Decety using psychophysics, functional neuroimaging, H-reflex excitability, as well as measures of the autonomic nervous system, demonstrated that imagining an action activates similar neural representations that would be engaged by carrying out the same action. For instance, an increase in heart rate and respiratory rate is proportional to the level of mental effort in athletes who imagine running on a treadmill at different speeds. Imagining doing an action is associated with activation of the supplementary motor area, parietal cortex, somatosensory cortex, and cerebellum, brain regions involved in motor control. Together, these findings have been interpreted as a demonstration of functional equivalence between the imagination and the production of action, to the extent that they share the same motor representations underpinned by the same neurophysiological substrate. This theoretical framework was then extended to empathy and some aspects of social cognition.

Decety studies the neurobiological and psychological mechanisms that guide social decision-making, moral reasoning, empathy and sensitivity for justice, as well as how these abilities develop in children, and are shaped by life experiences and group dynamics. Decety conducts research on various aspects of empathy, including its evolutionary origins, its development in young children, as well as how empathy is modulated by the social environment and interpersonal relationships.

Decety investigates the development of moral behavior, generosity and distributive justice in children across South East Asia, Europe, the Middle East, North and South America, and South Africa. He argues that empathy is not necessarily a direct avenue to moral behavior, and that it can lead to immoral behavior. The influence that empathy and justice exert on one another is complex, and empathy can induce partiality and threaten justice principles.

Based on empirical research combining functional neuroimaging (fMRI and EEG), developmental psychology, and individual differences in personality traits, Decety argues that in order to promote justice, it may be more effective to encourage perspective taking and reasoning than emphasizing emotional sharing with the misfortune of others.