A meta-analysis of the effects of acute alcohol intoxication on witness recall

Theo Jores, Melissa F. Colloff, Lilian Kloft, Harriet Smailes, Heather D. Flowe*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


There is widespread belief in the legal system that alcohol impairs witness testimony. Nevertheless, most laboratory studies examining the effects of alcohol on witness testimony suggest that alcohol may affect the number of correct but not incorrect details recalled. However, it is difficult to draw conclusions because sample sizes, testing paradigms, and recall measures vary between individual studies. We conducted a meta-analysis to address this issue. We found alcohol intoxication had a significant and moderate sized effect on the number of correct details recalled (g = 0.40). The effect of alcohol on the number of incorrect details recalled was not significant. Further, the effect of alcohol on the recall of correct details was significantly moderated by multiple factors like intoxication level, the retention interval length between encoding and recall, and the types of questions asked (i.e., free recall vs. cued recall). We discuss the applied implications of the results.

Original languageEnglish
Pages (from-to)334-343
Number of pages10
JournalApplied Cognitive Psychology
Issue number3
Publication statusPublished - 1 May 2019


  • alcohol
  • eyewitness
  • investigative interviews
  • memory
  • recall
  • witness

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Developmental and Educational Psychology
  • Arts and Humanities (miscellaneous)


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