Second Generation Research on the Effectiveness of Early Intervention

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Abstract
This commentary discusses the program of research carried out by the Utah State Early Intervention Research Institute (EIRI) in the context of the characteristics associated with second generation research in early intervention. Specifically, the series of EIRI research studies focused on the three program features of age of start, intensity of intervention, and parent participation. This commentary provides an evaluation of these program features in terms of scientific quality, specificity of the research, and consistency with contemporary developmental/ecological approaches. Directions for future research are noted, and these include: greater emphasis on establishing expectations for outcomes derived from developmental models, multisite studies to permit more effective specificity analyses, and emphasis on identifying the characteristics of children and families who are at greatest risk of not responding to prevailing early intervention services and supports.