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Connelly, Brian S.; Sackett, Paul R.; Waters, Shonna D. – Personnel Psychology, 2013
Organizational and applied sciences have long struggled with improving causal inference in quasi-experiments. We introduce organizational researchers to propensity scoring, a statistical technique that has become popular in other applied sciences as a means for improving internal validity. Propensity scoring statistically models how individuals in…
Descriptors: Quasiexperimental Design, Control Groups, Inferences, Research Methodology
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Maddux, Cleborne D. – Computers in the Schools, 1995
Discusses problems of internal and external validity in research in educational computing. Highlights include three stages of modern research in educational computing, the need to describe control groups and instructional methodologies, and the need for a balance between theory and practice. (LRW)
Descriptors: Computer Uses in Education, Control Groups, Research Methodology, Research Problems