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Use and Misuse of No-Difference Findings in Eliminating Threats To Validity

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  • William H. Yeaton

    (University of Michigan, Center for Research on Utilization of Scientific Knowledge)

  • Lee Sechrest

    (University of Arizona)

Abstract

Donald Campbell and his colleagues have elaborated an approach to research based on the elimination of threats to four validity types: internal, external, construct, and statistical conclusion. The central thesis of this article is that the process of eliminating validity threats depends fundamentally on no-difference findings, a fact that, unfor tunately, has not been made explicit by researchers. The implications of this neglect are explored using examples from a number of different substantive areas such as psychology, health, and medicine. Finally, the intrinsic role of no-difference findings is described in the context of all four validity types, and suggestions for improving the process are offered.

Suggested Citation

  • William H. Yeaton & Lee Sechrest, 1986. "Use and Misuse of No-Difference Findings in Eliminating Threats To Validity," Evaluation Review, , vol. 10(6), pages 836-852, December.
    • Handle: RePEc:sae:evarev:v:10:y:1986:i:6:p:836-852
    DOI: 10.1177/0193841X8601000608
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