This study employed a meta-analytic approach to examine the effectiveness of graphic organizers (GOs) in improving academic and behavioral outcomes for K-12 students with disabilities, drawing from the single-case special education literature. Moderators at participant and study level were analyzed in addition to the main effects. A comprehensive…

Health education and behavior researchers and practitioners often develop, adapt, or adopt surveys/scales to quantify and measure cognitive, behavioral, emotional, and psychosocial characteristics. To ensure the integrity of data collected from these scales, it is vital that psychometric properties (i.e., validity and reliability) be assessed. The…

This review examines published secondary analyses of National Longitudinal Transition Study 2 (NLTS2) data, with a primary focus upon statistical objectives, paradigms, inferences, and methods. Its primary purpose was to determine which statistical techniques have been common in secondary analyses of NLTS2 data. The review begins with an…

Helms, Henze, Sass, and Mifsud (2006) defined good practices for internal consistency reporting, interpretation, and analysis consistent with an alpha-as-data perspective. Their viewpoint (a) expands on previous arguments that reliability coefficients are group-level summary statistics of samples' responses rather than stable properties of scales…

For more than 10 years, the "Journal of Positive Behavior Interventions" has published, among other types of articles, behavioral intervention outcome studies related to positive behavior support. Operationally defining interventions is important to facilitating replication studies and adoption of intervention in applied settings. Furthermore,…

Controversy over the proper place of significance testing within scientific methodology has continued for some time. The suggestion that effect sizes are more important than whether results are significant is presented. Effect size can be defined as an estimate of how much of the dependent variable is accounted for by the independent variables.…

Discussed methodological errors in child and marital treatment research. Made suggestions to avoid such errors. Areas covered are selection of subjects and therapists, scope and source of dependent measures, treatment specification and experimental design. Errors include unsubstantiated diagnoses; client labels; restricted outcome criteria; and…

Educational researchers have claimed that the quantitative and qualitative approaches to educational inquiry are, indeed, compatible. However, it would be unfortunate to discontinue this debate. The quantitative-qualitative debate began with the interpretive approach to social inquiry. Dilthey argued that since cultural/moral sciences differ from…

Psychometric theory has been one of psychology's stronger foundations and a major contributor to the recognition of psychology as a scientific discipline. Basic principles of psychometric theory led to the development of respected intelligence tests and large and comprehensive testing and assessment programs. This paper synthesizes major…

The Learner Report (LR) (A. D. De Groot, 1974) is an instrument to identify educational objectives that resist obvious measurement. An overview is presented of studies using the LR and problems and solutions found in the literature and identified in a survey of 16 Dutch LR users. (SLD)