Examining Dimensions of Treatment Intensity and Treatment Fidelity in Mathematics Intervention Research for Students at Risk

To prevent academic failure and promote long-term success, response-to-intervention (RtI) is designed to systematically increase the intensity of delivering research-based interventions. Interventions within an RtI framework must not only be effective but also be implemented with treatment fidelity and delivered with the appropriate level of treatment intensity to improve student mathematics achievement. The purpose of this systematic review was to explore the mathematics intervention research for students at risk of mathematics failure by examining intervention characteristics related to treatment fidelity and intensity. Results from 66 math intervention studies conducted from 2004 to 2015 were summarized. The majority of studies monitored treatment fidelity and provided details of some aspects of treatment intensity (i.e., dose, group size). However, interventionists’ characteristics, implementation characteristics, and treatment design were less frequently reviewed. Implications for future research and educational practices are discussed.