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Is justice blind or myopic? An examination of the effects of meta-cognitive myopia and truth bias on mock jurors and judges

Published online by Cambridge University Press:  01 January 2023

Myrto Pantazi*
Affiliation:
Center for Social and Cultural Psychology & Center of Research in Linguistics LaDisco, Université Libre de Bruxelles. Myrto Pantazi is now at Oxford Internet Institute, University of Oxford, 1 St Giles, Oxford, OX1 3JS, UK
Olivier Klein
Affiliation:
Center for Social and Cultural Psychology, Université Libre de Bruxelles
Mikhail Kissine
Affiliation:
Center of Research in Linguistics LaDisco, Université Libre de Bruxelles
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Abstract

Previous studies have shown that people are truth-biased in that they tend to believe the information they receive, even if it is clearly flagged as false. The truth bias has been recently proposed to be an instance of meta-cognitive myopia, that is, of a generalized human insensitivity towards the quality and correctness of the information available in the environment. In two studies we tested whether meta-cognitive myopia and the ensuing truth bias may operate in a courtroom setting. Based on a well-established paradigm in the truth-bias literature, we asked mock jurors (Study 1) and professional judges (Study 2) to read two crime reports containing aggravating or mitigating information that was explicitly flagged as false. Our findings suggest that jurors and judges are truth-biased, as their decisions and memory about the cases were affected by the false information. We discuss the implications of the potential operation of the truth bias in the courtroom, in the light of the literature on inadmissible and discredible evidence, and make some policy suggestions.

Information

Type
Research Article
Creative Commons
Creative Common License - CCCreative Common License - BY
The authors license this article under the terms of the Creative Commons Attribution 4.0 License.
Copyright
Copyright © The Authors [2020] This is an Open Access article, distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 0

Figure 1: Study 1: Mean judgment severity as a function of whether the false information contained in the reports was aggravating or mitigating. Judgments are displayed separately for each group. Error bars represent 95% CIs.

Figure 1

Figure 2: Study 1: Mean error rates for the true and false information in the memory test, separately for each group. Black bars represent true statements misremembered as false and grey bars represent false statements misremembered as true. Error bars represent 95% CIs.

Figure 2

Table 1: Mean sensitivity and bias measures and 95% CIs per group in Study 1

Figure 3

Figure 3: Study 2: Mean judgment severity as a function of whether the false information contained in the reports was aggravating or mitigating. The judgments of the judges are pitted against those of the mock jurors in Study 1. Error bars represent 95% CIs.

Figure 4

Figure 4: Study 2: Mean error rates for the true and false information in the memory test. The memory pattern of the judges is pitted against the memory pattern of the student participants of Study 1. Error bars represent 95% CIs.

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