Widely regarded as the standard reference in the field, this handbook offers a comprehensive analysis of developmental, clinical, and social aspects of mental health from birth to the preschool years. Leading authorities explore models of development; biological, family, and sociocultural risk and protective factors; and frequently encountered disorders and disabilities. Evidence-based approaches to assessment and treatment are presented, with an emphasis on ways to support strong parent-child relationships. The volume reviews the well-documented benefits of early intervention and prevention and describes applications in mental health, primary care, childcare, and child welfare settings.