Between a Rock and a Hard Place Scientifically Based Evidence in Evaluation Presentation to the Canadian Evaluation Society Vancouver, B.C. June 3, 2003.

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Presentation transcript:

Between a Rock and a Hard Place Scientifically Based Evidence in Evaluation Presentation to the Canadian Evaluation Society Vancouver, B.C. June 3, 2003

What Works Clearinghouse A new U.S. federal initiative To be an ongoing public resource that will assess and report scientific evidence on “What Works?" in education Systematic review processes will be used to report on the quantity, quality, and relevance of evidence, and magnitude of effects of specific educational interventions

What is empirical evidence? Scientifically-based research from fields such as psychology, sociology, speech & hearing, economics, and neuroscience, and especially from research in educational settings Empirical data on performance used to compare, evaluate, and monitor progress

Evidence-Based Education

EBE – Where Are We?

Quality: Levels of Evidence All evidence is NOT equal for questions of effectiveness (what works) 1.Randomized trial (true experiment) 2.Comparison groups (quasi-experiment) 3.Pre-/Post- comparison 4.Corelational studies 5.Case studies 6.Anecdotes

What might this mean for evaluators? Evaluation questions reduced to what works questions. Evaluation costs redirected from complex studies of multiple variables to RCT’s Evaluators’ bookshelves filling up with research design texts and pushing evaluation texts aside Logic models falling into disuse Evaluations tapped for inclusion in reviews/syntheses often not complete Client requests for RCT evaluations

Randomized Trials: The gold standard Claims about the effects of an educational intervention on outcomes Two or more conditions that differ in levels of exposure to the educational intervention Random assignment to conditions Tests for differences in outcomes