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Stability in the metamemory realism of eyewitness confidence judgments

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Abstract

The stability of eyewitness confidence judgments over time in regard to their reported memory and accuracy of these judgments is of interest in forensic contexts because witnesses are often interviewed many times. The present study investigated the stability of the confidence judgments of memory reports of a witnessed event and of the accuracy of these judgments over three occasions, each separated by 1 week. Three age groups were studied: younger children (8–9 years), older children (10–11 years), and adults (19–31 years). A total of 93 participants viewed a short film clip and were asked to answer directed two-alternative forced-choice questions about the film clip and to confidence judge each answer. Different questions about details in the film clip were used on each of the three test occasions. Confidence as such did not exhibit stability over time on an individual basis. However, the difference between confidence and proportion correct did exhibit stability across time, in terms of both over/underconfidence and calibration. With respect to age, the adults and older children exhibited more stability than the younger children for calibration. Furthermore, some support for instability was found with respect to the difference between the average confidence level for correct and incorrect answers (slope). Unexpectedly, however, the younger children’s slope was found to be more stable than the adults. Compared to the previous research, the present study’s use of more advanced statistical methods provides a more nuanced understanding of the stability of confidence judgments in the eyewitness reports of children and adults.

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Acknowledgments

This study was partially funded by the Crime Victim Compensation and Support Authority and partially by the Swedish Research Council (VR) with grants to the second author.

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Authors and Affiliations

  1. Department of Psychology, University of Gothenburg, Box 500, 40530, Göteborg, Sweden

    Sandra Buratti & Carl Martin Allwood

  2. Department of Psychology, Lund University, Lund, Sweden

    Marcus Johansson

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  1. Sandra Buratti
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  2. Carl Martin Allwood
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  3. Marcus Johansson
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Correspondence to Sandra Buratti.

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Buratti, S., Allwood, C.M. & Johansson, M. Stability in the metamemory realism of eyewitness confidence judgments. Cogn Process 15, 39–53 (2014). https://doi.org/10.1007/s10339-013-0576-y

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