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We used an existing body of research (i.e., parent implemented functional-assessment based interventions) to examine visual analysis features and processes and evaluate the reliability of two frequently used non-overlap indices (NAP & Tau-U) and a novel effect size index-the between-case standardized mean difference (BC-SMD). Results indicated that visual analysis terms and procedures were inconsistently used across studies. Further, there was limited agreement between the non-overlap indices and independent visual analysis. Results regarding the BC-SMD were inconclusive given only 5 of the 15 studies were eligible for analyses for different dependent variables. Our results suggest that visual analysis standards are needed by which single case researchers analyze and report their results. Further, additional research is needed refining SCR effect sizes, which can be used to describe the magnitude of change within and across SCR studies with functional relations. [ABSTRACT FROM AUTHOR]

Two studies evaluated Recognition & Response (R&R)—an instructional system consisting of formative assessment, foundational instruction, and targeted small-group lessons designed for use with pre-kindergarteners. Study 1 involved 174 four-year-old children (83 target and 91 comparison) from 24 classrooms in community-based programs, and Study 2 involved 213 four-year-old children (106 target and 107 comparison) from 24 classrooms in one large school district. In both studies, teachers administered a brief, standardized language and literacy assessment to select the four lowest-scoring children within each classroom (Recognition), and then provided small-group lessons to these target children using a curriculum focused on language and literacy skills (Response). Across both studies, the results indicated that target children who received the small-group lessons showed larger gains on some language and literacy skills than a comparison group consisting of classmates who had lower than average scores at baseline and did not receive the small-group lessons. Target children made greater gains than the comparison group in print knowledge in Study 1 and in vocabulary and phonological awareness in Study 2. Both studies found high levels of implementation fidelity and treatment acceptability among the teachers who implemented the intervention. [ABSTRACT FROM AUTHOR]