Iroise obtained a PhD from the University of Paris VI and subsequently worked as a postdoc in labs in London, Cambridge and Stockholm. In 2012, she started her own lab in the Department of Psychological Sciences at Birkbeck, University of London, before moving to the University of Melbourne in 2023, to take on an ARC Future Fellowship. Iroise uses a variety of methods to study brain and cognitive development including functional and structural neuroimaging, behavioural assessments, and genetics. She is interested in the impact of cognitive training, from computerised games to mindfulness meditation practice, on cognition in children and adolescents, as well as the potential implications of neuroscience research for education. Her ARC fellowship is about the development of metacognition during childhood and adolescence, and how it is linked to cognitive control development and mathematics achievement.