ZERO TO THREE is undertaking a collaborative review of the DC:0–5 Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood. This effort reflects our continued commitment to ensure the manual stays aligned with science, practice, and families' needs.
Guided by a diverse group of experts across research, practice, and policy, the review process is part of our regular cycle of reflection and refinement. The goal is to strengthen a trusted resource that professionals around the world use to support the mental health of babies, toddlers, and their families.
As part of this process, we invite you to share your insights and experiences through this survey.
Please submit your feedback by 27 February 2026.
This survey should take approximately 10–15 minutes to complete.
Please email prodevelopment@zerotothree.org with any questions or for technical assistance.