Morrissey, Leikes, and Cochran (this issue) raise concerns about potential negative effects of state pre-kindergarten (pre-K) on the early care and education system. To put their study in context, I reviewed national demographic and enrollment trends. I found little evidence of negative effects from state pre-K policy. One reason may be that…

Advocates research on the effectiveness of early intervention programs for disabled children based on scientific method, rather than advocacy of positions. Reviews effective intervention practices. Illustrates use of the biosocial systems research model, examining biological traits in the context of social systems. Discusses benefits of this…