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The objective of this article is to offer guidelines regarding the selection, calculation, and interpretation of effect sizes (ESs). To accomplish this goal, ESs are first defined and their important contribution to research is emphasized. Then different types of ESs commonly used in group and correlational studies are discussed. Several useful resources are provided for distinguishing among different types of effects and what modifications might be required in their calculation depending on...
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This study analyzed the reporting of multilevel modeling applications of a sample of 99 articles from 13 peer-reviewed journals in education and the social sciences. A checklist, derived from the methodological literature on multilevel modeling and focusing on the issues of model development and specification, data considerations, estimation, and inference, was used to analyze the articles. The most common applications were two-level models where individuals were nested within contexts. Most...
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This study reviews student assessment data collected from 15 EDC projects to determine the impact of interactive radio instruction (IRI) on student achievement in hard-to-reach areas.
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Abstract. This paper presents the results of two randomized experiments conducted in schools in urban India. A remedial education program hired young women to
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The intersection of mixed methods and social justice has implications for the role of the researcher and choices of specific paradigmatic perspectives. The transformative paradigm with its associated philosophical assumptions provides a framework for addressing inequality and injustice in society using culturally competent, mixed methods strategies. The recognition that realities are constructed and shaped by social, political, cultural, economic, and racial/ethnic values indicates that...
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Experiments that assign intact groups to treatment conditions are increasingly common in social research. In educational research, the groups assigned are often schools. The design of group-randomized experiments requires knowledge of the intraclass correlation structure to compute statistical power and sample sizes required to achieve adequate power. This article provides a compilation of intraclass correlation values of academic achievement and related covariate effects that could be used...
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Change is constant in everyday life. Infants crawl and then walk, children learn to read and write, teenagers mature in myriad ways, the elderly become frail and forgetful. Beyond these natural processes and events, external forces and interventions instigate and disrupt change: test scores may rise after a coaching course, drug abusers may remain abstinent after residential treatment. By charting changes over time and investigating whether and when events occur, researchers reveal the...
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The sixth paper in this series discusses the design and principles of randomised controlled trials.
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A newer edition of this book is available at the following address: https: //rowman.com/ISBN/9780759123212 Rapid Assessment Process (RAP) has gone under many names but invariably uses the techniques of fieldwork and ethnography in a telescoped manner to provide solid, field-based research findings for use by policymakers and program planners. It uses an emic perspective, a team of researchers, triangulation of research findings, and iterative process to produce high-quality research in a...