Ruling Out Threats To Validity

Charles S. Reichardt and Harry F. Gollob
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Charles S. Reichardt: University of Denver
Harry F. Gollob: University of Denver

Evaluation Review, 1989, vol. 13, issue 1, 3-17

Abstract: The estimate-and-subtract methodfor eliminating threats to validity is described. Yeaton and Sechrest (1986, 1987b) argue that "no-difference"findings are fundamental to the process of eliminating threats to validity. The estimate-and-subtract method, however, eliminates a threat to validity without reliance on no-difference findings. This article argues that eliminating a threat to validity using the estimate-and-subtract method often is preferable to eliminating a threat to validity using no-difference findings. The article also shows how to improve the use of no-difference findings in those instances where their use is appropriate.

Date: 1989
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Persistent link: https://EconPapers.repec.org/RePEc:sae:evarev:v:13:y:1989:i:1:p:3-17

DOI: 10.1177/0193841X8901300101

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