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Download full textNorton, Jan – NADE Digest, 2006
Studies in education often report the differences between participants' and non-participants' test scores, course grades, retention, and other criteria. When participants' average performance is higher, it can be difficult to attribute the improvements to participation. Comparing participants and non-participants on other measures can strengthen…
Descriptors: Educational Research, Research Methodology, Comparative Analysis, Student Characteristics
