Experimental and quasi-experimental designs are used in educational research to establish causality and develop effective practices. These research designs rely on a counterfactual model that, in simple form, calls for a comparison between a treatment group and a control group. Developers of educational practices often assume that the population…

The purpose of this study was to determine the proportion of empirical studies published in the last 5 years in a sample of special education peer-reviewed journals that: (1) assessed the effects of reading and math interventions with group designs and; (2) used random assignment to treatment conditions to test those interventions. A hand search…

An evaluation of empirical evidence from three studies published in journal articles and a book chapter indicated insufficient cause to view the Adaptive Learning Environments Model as a successful, large-scale, full-time mainstreaming program for integrating handicapped pupils and remedial/compensatory education students into general education.…

This paper refutes the arguments of Margaret Wang and Herbert Walberg in their support of the Adaptive Learning Environments Model (ALEM) and the General Education Initiative. It focuses on the small number of ALEM implementations and replications, weaknesses of the research and evaluations supporting ALEM, and other specific criticisms. (JDD)