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Research Report
Calibration Trumps Confidence as a Basis for Witness Credibility
Elizabeth R. Tenney 1 , Robert J. MacCoun 2 , Barbara A. Spellman 1 , and Reid Hastie 3
  1 Department of Psychology, University of Virginia;   2 Goldman School of Public Policy and Boalt Hall School of Law, University of California, Berkeley; and   3 Graduate School of Business, University of Chicago
 Address correspondence to Elizabeth R. Tenney, Department of Psychology, University of Virginia, 102 Gilmer Hall, P.O. Box 400400, Charlottesville, VA 22904-4400, e-mail: tenney@virginia.edu.
Copyright Copyright © 2007 Association for Psychological Science

ABSTRACT

ABSTRACT—Confident witnesses are deemed more credible than unconfident ones, and accurate witnesses are deemed more credible than inaccurate ones. But are those effects independent? Two experiments show that errors in testimony damage the overall credibility of witnesses who were confident about the erroneous testimony more than that of witnesses who were not confident about it. Furthermore, after making an error, less confident witnesses may appear more credible than more confident ones. Our interpretation of these results is that people make inferences about source calibration when evaluating testimony and other social communication.


(Received 2/6/06; Revision accepted 5/24/06; Final materials received 6/12/06)

DIGITAL OBJECT IDENTIFIER (DOI)
10.1111/j.1467-9280.2007.01847.x About DOI

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