The effects of experience of early intervention on low birth weight, premature children: The infant health and development program

This study explores individuals' experience of early intervention in two settings (the home and the child development center) and the effect of that experience on child and parental outcomes in the Infant Health and Development Program (IHDP). The IHDP was a randomized clinical trial designed to test the efficacy of educational and family support services on reducing developmental delays in low birth weight (LBW), premature infants (N=985) during the first 3 years of life. This study focused on children in the intervention group who received at least one home visit and one day at the center each year (n=296). Three approaches to measuring participants' experience of intervention were defined-number of contacts in the home and at the child care center (i.e., Exposure), number of activities presented per visit to the parent in the home or per day to the child at the center (i.e., Rate); and a combination of the parent's interest in the intervention activities in the home and the child's mastery of the intervention tasks taught at the center (i.e., Active Experience). More substantial contributions to both child IQ and the HOME scores at age 3 were found with the Active Experience approach than with the Exposure or the Rate approach, after controlling for initial background variables, family socioeconomic status, children's initial IQ, and parental cognitive ability. Further, a high level of Active Experience from both the parent and the child was associated with higher IQ scores at ages 1, 2, and 3 and higher HOME scores at age 3 than was found when only a high level of Active Experience from only the parent or the child, or neither, was involved. Implications for future intervention programs are discussed.