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Research Article

Laypeople’s interpretations of ‘high confidence’Open DataOpen Materials

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Received 31 Oct 2023, Accepted 05 Mar 2024, Published online: 18 Mar 2024
 

ABSTRACT

High confidence has been associated with high accuracy under certain conditions. Yet, how researchers operationalize ‘high confidence’ varies across publications and depends on who is asked. In this study, we collected numeric interpretations to determine thresholds for high confidence. Layperson participants provided a minimum, best, and maximum estimate for ‘high confidence’ in an eyewitness lineup decision on a scale of 0-100. The distribution of best estimates peaked at 90.90%. The peak value for the minimum estimate was 83.80%. Critically, the distributions of responses were highly variable: 68.27% of participants (one standard deviation around the mean) provided best estimates between 79% and 97% and minimum estimates between 60% and 93%. This variability in laypeople’s perceptions implies there is likely to be considerable variability in how jurors and practitioners interpret confidence. Research and practice would benefit from a standardized definition of what constitutes ‘high confidence.’

Open Scholarship

This article has earned the Center for Open Science badges for Open Data, Open Materials and Preregistered. The data and materials are openly accessible at http://doi.org/10.17605/OSF.IO/BK8MH (Open Science Framework).

Acknowledgement

Hypotheses, method, and analyses were pre-registered on the Open Science Framework (https://osf.io/bk8mh/?view_only = 42c18001ad324f2b8657184ab3f69dc4). The data that support the findings of this study are openly available on the Open Science Framework.

Disclosure statement

No potential conflict of interest was reported by the author(s).

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