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ERIC Number: ED530559
Record Type: Non-Journal
Publication Date: 2012
Pages: 7
Abstractor: ERIC
Estimates of External Validity Bias When Impact Evaluations Select Sites Purposively
Stuart, Elizabeth A.; Olsen, Robert B.; Bell, Stephen H.; Orr, Larry L.
Society for Research on Educational Effectiveness
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 evaluations that can result from selecting sites purposively. This will help researchers and funding agencies understand the implications of purposive site selection. (Contains 1 figure.)
Society for Research on Educational Effectiveness. 2040 Sheridan Road, Evanston, IL 60208. Tel: 202-495-0920; Fax: 202-640-4401; e-mail:; Web site:
Publication Type: Reports - Research
Education Level: Elementary Education; Grade 3
Audience: Researchers
Language: English
Sponsor: N/A
Authoring Institution: Society for Research on Educational Effectiveness (SREE)