Juror perceptions of bystander and victim intoxication by different substances

Natali Dilevski*, Hayley J. Cullen, Celine van Golde, Heather D. Flowe, Helen M. Paterson, Melanie K. T. Takarangi, Lauren A. Monds

*Corresponding author for this work

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This study examined the effects of bystander or victim intoxication during a crime on juror perceptions and decision-making. Mock jurors (N = 261) read testimony from a bystander or victim to an assault, who mentioned that they had consumed alcohol, cannabis, amphetamines, or no substances prior to the crime. Participants delivered a verdict, rated the defendant’s guilt, and rated the bystander/victim on their honesty, credibility, and cognitive competence. Witness intoxication and witness role did not influence defendant guilt. However, participants judged any witness intoxicated by amphetamines as less credible and cognitively competent than a sober witness. Furthermore, victims were judged to have lower credibility, cognitive competence, and honesty than bystanders. These findings suggest that jurors’ decision-making about defendant guilt might not be influenced by witness intoxication or witness type. A witness’ testimony, however, might be evaluated as less credible when delivered by a victim or an amphetamine-intoxicated witness.
Original languageEnglish
Pages (from-to)569–587
Number of pages19
JournalCriminal Justice and Behavior
Issue number4
Early online date12 Feb 2024
Publication statusPublished - Apr 2024

Bibliographical note

Copyright the International Association for Correctional and Forensic Psychology 2024. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


  • alcohol and other drugs
  • intoxication
  • juror decision-making
  • credibility
  • witness evidence


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