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…

This article introduces a bootstrap generalization to the Modified Parallel Analysis (MPA) method of test dimensionality assessment using factor analysis. This methodology, based on the use of Marginal Maximum Likelihood nonlinear factor analysis, provides for the calculation of a test statistic based on a parametric bootstrap using the MPA…

Forty-seven young children, 15 with disabilities, were observed 4 times for types and levels of engagement. Results indicated that engagement is difficult to measure through molecular data collection techniques because of error in dependability measures. The number of observed sessions could be increased to achieve generalizability, but increases…

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…