This guide will help researchers design and implement impact studies in education so that the findings are more generalizable to the study's target population. Guidance is provided on key steps that researchers can take, including defining the target population, selecting a sample of schools--and replacement schools, when needed--managing school…

Donald Campbell's approach to causal inference (D. T. Campbell, 1957; W. R. Shadish, T. D. Cook, & D. T. Campbell, 2002) is widely used in psychology and education, whereas Donald Rubin's causal model (P. W. Holland, 1986; D. B. Rubin, 1974, 2005) is widely used in economics, statistics, medicine, and public health. Campbell's approach focuses on…

Calculating and reporting appropriate measures of effect size are becoming standard practice in psychological research. One of the most common scenarios encountered involves the comparison of 2 groups, which includes research designs that are experimental (e.g., random assignment to treatment vs. placebo conditions) and nonexperimental (e.g.,…

Reviewed the 425 articles from five volumes of the Journal of Counseling Psychology (JCP). Results showed around 70 percent included samples obtained from university populations; 54.4 percent specified limitations and 38.44 percent did not. Gelso's response addresses the suggestion that the JCP is basically concerned with academic environments.…

A survey of studies in the "Journal of Speech and Hearing Disorders" and the "Journal of Speech and Hearing Research" found that only 12 direct replications and 15 systematic replications appeared in a total of 271 studies. Based on the probabilities of false findings in this literature, replication is recommended to verify…

Review of the research literature on functional assessment-based interventions for students with or at risk for emotional and behavioral disorders identified key issues in the design of these studies. Issues included (1) an emphasis on descriptive analysis; (2) interventions employed and procedural integrity; (3) generalization and maintenance;…

Criticized in this response is research published previously in "The Journal of Environmental Education." Considered are the limitations of the project, experimental design, control of variables, and the use of the case study approach. Includes 35 references. (CW)

In this book, which applies the state of the art in qualitative research to special education, qualitative research is used as a generic term for investigative methodologies described variously as ethnographic, naturalistic, anthropological, field research, or participant-observer research. Chapter 1 introduces and defines qualitative research and…