Through a portfolio of studies, we investigate:

• Social Network Interventions: how peer influence, social support, and network structures can be harnessed to promote healthier behaviours and stronger communities
• Simulation-Based Approaches: how computational models help us test “what-if” scenarios and optimise intervention design before implementation
• Social Media and Digital Platforms: how online social spaces can be used to engage young people and communities in health promotion, while also addressing risks like social comparison and exclusion
• Network Methods and Measurement: advancing the tools and frameworks needed to analyse, visualise, and integrate social-network data within real-world health studies
• The MECHANISMS Study: uncovering how and why network and norm-based interventions work by tracing the social and psychological processes linking them to behaviour change
• Adolescent Friendship Quality: understanding how the quality of friendships influences wellbeing, mental health, and social development in adolescence

Together, these strands aim to move beyond individual-level approaches to health, showing that behaviour change is a social process shaped by networks of friends, peers, families, and communities.

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