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Group-based biases and validity in eyewitness credibility judgments: Examining effects of witness ethnicity and presentation modality.
Stockholm University, Faculty of Social Sciences, Department of Psychology.
2005 (English)In: Journal of Applied Social Psychology, ISSN 0021-9029, Vol. 35, no 7, 1474-1501 p.Article in journal (Refereed) Published
Abstract [en]

To study how witness ethnicity and testimony presentation mode affected judgments of eyewitness credibility, testimonies from 6 immigrant and 6 Swedish accuracy-matched witnesses to a crime were presented to Swedish fact finders (N = 120) in videotape or as a transcript. Results showed that witnesses were perceived as more credible in the visual as compared to the written medium. Moreover, witness ethnicity affected judgments differentially depending on presentation mode for fact finders high in prejudice toward immigrants. Results also revealed that fact finders' judgments corresponded with the self-reported confidence of Swedish, but not immigrant witnesses and that in the transcript condition, judgmental validity was lower in estimates of Swedes' as compared to immigrants' accuracy. The findings indicate that presentation mode can function as a moderator of group-based effects in social judgments, and that both psychological theory and judicial systems need to consider thoroughly how different stimulus presentations compare in terms of the impact on perceivers.

Place, publisher, year, edition, pages
2005. Vol. 35, no 7, 1474-1501 p.
Keyword [en]
witness ethnicity, eyewitness credibility, testimony presentation mode, group based biases
National Category
URN: urn:nbn:se:su:diva-13493DOI: doi:10.1111/j.1559-1816.2005.tb02180.xOAI: diva2:180013
Available from: 2008-04-09 Created: 2008-04-09 Last updated: 2011-01-12Bibliographically approved

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Lindholm, Torun
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