This study compared levels of parent involvement in early intervention services for children under three which were delivered in community settings (children's homes and child care programs) and specialized settings (early intervention centers and provider offices) in the USA. Respondents reported the highest levels of parental involvement in the home. However, level of involvement in the home was not significantly higher than the provider's office for parent attendance, quality and content of parent-provider communication, and effective instruction; level of provider communication and instruction to parents was not significantly higher in the home than in the early intervention center. Early intervention services in the child care setting were associated with the lowest levels of parent involvement. With the exception of child care, these results suggest that specialized and natural settings are associated with similar levels of parent involvement. (author abstract)