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Direct linkPeltier, Corey; Flores, Margaret M.; Strickland, Tricia K. – Learning Disability Quarterly, 2023
Single-case research design is a useful methodology for evaluating the presence of a functional relation between an intervention and the mathematical performance of students with a learning disability. However, a functional relation cannot be established with threats to internal validity of the design. External validity is impacted if researchers…
Descriptors: Research Design, Intervention, Mathematics Achievement, Students with Disabilities
