One size does not fit all: addressing the challenges of intervention for complex developmental issues.

The Journal of Child Psychology and Psychiatry is committed to publishing implementational research, or turning therapeutic research discoveries into practical benefit for human health and well-being. This editorial showcases three such papers in this issue from diverse fields in developmental science. The papers highlight the challenges of implementing intervention under real-world constraints, and highlight key issues that clinicians and researchers will need to address in future work. Despite these challenges, each approach shows promise and innovation in delivering high-quality interventions to vulnerable children and families.