The outcome variable was teacher-reported social skills of children in grade 1, assessed with the Social Skills Rating System (Gresham & Elliott, 1990). Standardized scores revealed sample mean and standard deviation (M = 104.30, SD = 13.19) that were near population values, indicating that children in the sample were fairly representative of the population. Greater detail on all measures is available in NICHD Early Child Care Research Network (2005).
