Hanan El Marroun

Hanan El Marroun holds dual academic appointments at Erasmus University Rotterdam:

• Associate Professor at Erasmus School of Social and Behavioural Sciences (with Erasmus MC affiliation)
• Endowed Professor in Clinical Psychology at Erasmus School of Social and Behavioural Sciences

Her research integrates epidemiology and neuroscience to investigate sensitive periods of brain development across prenatal stages, the first 1000 days of life, and adolescence. She examines how maternal, fetal, and child health factors influence behavioral, cognitive, morphological, and connectivity outcomes in brain development, with particular emphasis on substance use during pregnancy and adolescence. Her work bridges clinical psychology with population-based longitudinal studies.

She actively disseminates knowledge through teaching bachelor's and master's students at Erasmus University Rotterdam, focusing on research methodology and her specialized domains. Her findings have generated significant media attention regarding childcare impacts on educational outcomes and childhood mental health.