Special educators serve a diverse population of students with unique strengths and needs, and adaptive interventions that account for individual differences before and during the intervention are an important tool to moving the field toward more individualized practices. The purpose of this article is to detail the conceptualization and…

Interventions often require multiple decisions to improve outcomes for every student. Whether the decision to implement a practice, tailor an existing protocol, or change approaches, these decisions should be based on individual variables and outcomes via a sequence of treatment. To develop adaptive interventions that have sufficient evidence to…

Experiments allow researchers to randomly vary the key manipulation, the instruments of measurement, and the sequences of the measurements and manipulations across participants. To date, however, the advantages of randomized experiments to manipulate both the aspects of interest and the aspects that threaten internal validity have been primarily…

In reviewing Herbert J. Klausmeier's academic career, this paper discusses four major areas of his contributions: (1) cognitive learning and development (CLD); (2) individual differences and related educational provisions; (3) educational research as a field of scientific inquiry; and (4) teacher education. CLD, Klausmeier' major contribution, was…

The proceedings of a July 1989 conference of directors of research grants and research-based contracts funded by the Division of Innovation and Development of the Office of Special Education Programs are presented. The meeting featured a combination of general sessions, small-group discussions on research issues and content areas, and a panel…