Advancing Validity in Outcome Evaluation

EDITORS' NOTES 1 Huey T. Chen, Stewart I. Donaldson, Melvin M. Mark 1. Validity Frameworks for Outcome Evaluation 5 Huey T. Chen, Stewart I. Donaldson, Melvin M. Mark This chapter discusses the concept of validity as it applies to outcome evaluation and the contributions of the Campbellian validity typology, as well as related criticisms, and overviews the issue. 2. What Works for Whom, Where, Why, for What, and When? Using Evaluation Evidence to Take Action in Local Contexts 17 John Gargani, Stewart I. Donaldson After discussing limits of the Campbellian tradition regarding external validity, this chapter argues that the external validity of an evaluation could be enhanced by better addressing issues about what works for whom, where, why, for what, and when. 3. New (and Old) Directions for Validity Concerning Generalizability 31 Melvin M. Mark This chapter reviews several alternative framings of generalizability issues and provides potentially fruitful directions for enhancing external validity in outcome evaluation. 4. Criticisms of and an Alternative to the Shadish, Cook, and Campbell Validity Typology 43 Charles S. Reichardt This chapter presents four criticisms of the Shadish, Cook, and Campbell (2002) typology of validity. An alternative typology is proposed that avoids these criticisms. 5. Reframing Validity in Research and Evaluation: A Multidimensional, Systematic Model of Valid Inference 55 George Julnes A validity framework is described with three dimensions--representation (construct validity), causal inference (internal and external validity), and valuation. 6. Conflict of Interest and Campbellian Validity 69 Ernest R. House Problems related to bias due to researchers' intentional and unintentional manipulation are discussed, as are strategies for dealing with such problems and how they might be incorporated within the Campbellian validity tradition. 7. The Construct(ion) of Validity as Argument 81 Jennifer C. Greene This chapter presents an interpretive/constructivist perspective on outcome evaluation and on the warrants for our outcome-evaluation conclusions. It underscores the importance of developing warrants through argumentation, in addition to selected empirical evidence. 8. Assessing Program Outcomes From the Bottom-Up Approach: An Innovative Perspective to Outcome Evaluation 93 Huey T. Chen, Paul Garbe The authors argue that, to be stakeholder responsive, evaluation must apply an integrative validity model and a bottom-up approach to outcome evaluation to address both scientific and practical issues. 9. The Truth About Validity 107 William R. Shadish This chapter discusses the contribution of the chapters in the issue, including the extent to which they offer something new and provide justified arguments, and considers how discussions of validity might contribute productively to evaluation theory and practice. INDEX 119