An extensive literature links language problems with behavioral difficulties and academic underachievement. Although less extensive, emerging literature suggests that temperament, Positive Affectivity (PA) in particular, contributes to language development. Thus, the present study was focused on PA related temperament dimensions in infancy as…

This report describes options for study designs to evaluate the effect of early intervention on infants and toddlers, birth to three, with disabilities or developmental delays and their families in Washington state. Information was gathered from extensive literature reviews, a survey of local assessment efforts in Washington, a technical data…