Special education researchers have indicated the need for an increased use of mixed methods research to address many of the complex issues in the field. An important first step in designing mixed methods research is to develop quality research questions. The aim of this article is to provide fundamental information on the formation of mixed…

Consistency in the title, problem, purpose, and research question improve the logic and transparency of research. When these components of research are aligned research design and planning are more coherent and research reports are more readable. This article reviews the process for checking for and improving consistency. Numerous examples of…

In a conjoint-analysis consumer-preference study, researchers must determine whether the product factor estimates, which measure consumer preferences, should be calculated and interpreted for each respondent or collectively. Multiple regression models can determine whether to aggregate data by examining factor-respondent interaction effects. This…

This article presents two methods of estimating a study's replicability that researchers should consider reporting along with their statistical significant and effect size findings. One method of estimating the replicability of the findings deals with replication in the exact same system. The second method, which may contain subjective probability…

Presents situations in which researchers can use the general linear model to uncover reasons for discrepant effect-size results of meta-analysis of similar studies. Situations include similarly labeled treatments or participants differing in important ways, treatment effectiveness varying by subject aptitude or situational variables, research…

Introduces the basic concepts of chaos theory and chaos modeling. Relates chaos theory to qualitative research and factor analysis. Describes some current research in education and psychology using chaos theory. Claims that the philosophical implications of chaos theory have been misapplied in practical terms. (KS)

Slavin discusses cooperative learning and the "best evidence" approach to research synthesis. Critiques Benjamin Bloom's mastery learning, Madeline Hunter's program, and expert-novice studies. Introduces his current program called "Success for All," which targets early childhood education and stresses success the first time…