Child maltreatment has well-established, wide-ranging, and long-term negative effects on children. Most children who have experienced maltreatment and are receiving services through the Child Welfare System (CWS) remain in their homes with their caregivers. While the need for parenting services is extensive, few intervention programs have proven to be efficacious in reducing child abuse and neglect within the CWS population, especially for infants and toddlers. It is essential that social service practitioners within the CWS delivery system are equipped to provide brief interventions to maltreating parents. This grant, "Training Social Work Providers: Intervention for Maltreating Families of Infants and Toddlers," is an evaluation of a training program for social welfare providers to implement a brief attachment theory-based intervention to families who have been investigated for child abuse and neglect by Child Protective Services. The program (Promoting First Relationships [PFR]; Kelly, Buehlman, & Caldwell, 2000) will be tested at two levels: through social welfare practice and at the level of outcomes for children and families.