This study used simulation techniques to evaluate the technical adequacy of three methods for the identification of specific learning disabilities via patterns of strengths and weaknesses in cognitive processing. Latent and observed data were generated and the decision-making process of each method was applied to assess concordance in…

This study examined the validity of Nonsense Word Fluency as an index of beginning reading proficiency for students in kindergarten through second grade. Validity evidence for Nonsense Word Fluency is addressed in the context of research-based instructional practices implemented on a large scale. Technical adequacy data are presented for all…

This invited commentary on the series of articles regarding the state of the extant research and practice concerning the implementation of response to intervention (RTI) will focus on the following issues: (a) what constitutes a comprehensive service delivery system that uses RTI as its driving principle; (b) the dependent measure by which the…