Lucy's research focuses on the impact of early life stress on psychological and behavioural development. In particular, her research examines the effects of bullying and maltreatment on young people’s mental health and wellbeing. Her research integrates methods from social epidemiology, developmental psychology and behavioural genetics in order to understand the complex genetic and environmental influences that promote resilience to victimization and early life stress. The aim of this research is to guide intervention work by identifying protective factors that promote lifelong resilience.