When classifying the evidence base of practices, special education scholars typically appraise study quality to identify and exclude from consideration in their reviews unacceptable-quality studies that are likely biased and might bias review findings if included. However, study quality appraisals used in the process of identifying evidence-based…

Augmentative and alternative communication (AAC) as an area of clinical and educational practice involves a myriad of decisions related to the symbols, devices, and strategies from which each client must choose. These decision-making points can be productively informed through evidence from comparative intervention studies. The purpose of this…

This article (1) defines "experiential learning" and some of its properties, purposes, and forms; (2) proposes a framework for thinking about evaluating educational programs; and (3) offers recommendations for future research to explore the value of experiential learning, guide program development, and increase knowledge about youth socialization…

The program of systematic evaluation of variables associated with visual learning was initiated in 1965 to investigate the impact of variables linked to effective, efficient use of instructional visual materials. A prototype experimental package, containing a specific unit of cognitive content, learner achievement objectives, four individual…