The effects of alcohol and co-witness information on memory reports: a field study

Rationale Witnesses who discuss a crime together may report details that they did not see themselves but heard about from their co-witness. Co-witness information may have beneficial and harmful effects on memory accuracy depending on whether the information was correct or incorrect. Objectives Give...

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Bibliographic Details
Published in:Psychopharmacology 2022-09, Vol.239 (9), p.2945-2953
Main Authors: Bartlett, Georgina, Albery, Ian P., Frings, Daniel, Gawrylowicz, Julie
Format: Article
Language:English
Subjects:
Accuracy
Alcohol
Biomedical and Life Sciences
Biomedicine
False information
Intoxication
Neurosciences
Original Investigation
Pharmacology/Toxicology
Psychiatry
Witnesses
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Summary:Rationale Witnesses who discuss a crime together may report details that they did not see themselves but heard about from their co-witness. Co-witness information may have beneficial and harmful effects on memory accuracy depending on whether the information was correct or incorrect. Objectives Given the prevalence of intoxicated witnesses, it is imperative to understand how alcohol influences this effect. Methods The present study asked pubgoers ( n  = 67) at varying levels of intoxication to recall a mock crime video after having also watched a video witness statement containing both correct and false information. Results Increased intoxication was associated with decreased confidence, completeness and accuracy, but no increased tendency to report false information. Exposure to incorrect post-event information (PEI) can lead to the incorporation of incorrect information, whereas exposure to correct PEI increased accuracy, regardless of individuals’ alcohol intoxication status. Conclusions Thus, whilst discussion and intoxication can negatively impact eyewitness memory, discussion may also have benefits for both sober and intoxicated witnesses.
ISSN:0033-3158
1432-2072
DOI:10.1007/s00213-022-06179-5