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Download full textStuart, Elizabeth A.; Olsen, Robert B.; Bell, Stephen H.; Orr, Larry L. – Society for Research on Educational Effectiveness, 2012
While there has been some increasing interest in external validity, most work to this point has been in assessing the similarity of a randomized trial sample and a population of interest (e.g., Stuart et al., 2010; Tipton, 2011). The goal of this research is to calculate empirical estimates of the external validity bias in educational intervention…
Descriptors: Validity, Bias, Computation, Outcome Measures
