Abstract
In 1996, the Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood was published to address the paucity of options for addressing infant and toddler mental health. Currently in its revised version and referred to as DC: 0-3R, it is designed to help professionals formulate a comprehensive assessment of infant and toddler mental health and relational issues. This paper addresses current research on infant and toddler mental health, the importance of prevention and early intervention, and the role of DC: 0-3R in these areas. Since professional perspective can ultimately influence the diagnostic process, this study focuses on the views and uses of professionals using DC: 0-3R. This is accomplished through the use of a qualitative study during which ten professionals were asked interview questions focusing on their training and experience, how they use the tool, and their thoughts of the tool. The data collected from these interviews is described and compared to other research on DC: 0-3R and infant and toddler mental health.