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Related Experiment Videos

Alcoholic blackout for criminally relevant behavior.

Kim van Oorsouw1, Harald Merckelbach, Dick Ravelli

  • 1Department of Experimental Psychology, Maastricht University, Maastricht, The Netherlands. k.vanoorsouw@psychology.unimaas.nl

The Journal of the American Academy of Psychiatry and the Law
|February 12, 2005
PubMed
Summary

Alcoholic blackouts are frequently reported by individuals and others. However, claims of blackouts in traffic stops are less common, suggesting strategic use in legal contexts.

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Area of Science:

  • Neuroscience
  • Psychology
  • Forensic Science

Background:

  • Criminal suspects sometimes claim alcohol-induced blackouts to mitigate responsibility.
  • The frequency and nature of alcoholic blackouts require investigation to distinguish genuine occurrences from strategic claims.

Purpose of the Study:

  • To determine the frequency of alcoholic blackouts in general populations.
  • To compare blackout claims in different contexts (general surveys vs. traffic control).
  • To explore the potential strategic function of claiming or denying alcoholic blackouts.

Main Methods:

  • Retrospective surveys of blackout frequency and type in two healthy samples (n=256, n=100).
  • Comparison of blood alcohol concentrations in a traffic-control study (n=100) between individuals who did and did not claim blackouts.

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Main Results:

  • High self-reported (67%) and other-reported (76%) blackout occurrences in survey samples.
  • Lower reported blackout incidence (14%) in a traffic-control study, particularly when individuals were involved in accidents.
  • Blood alcohol concentration data was compared between groups.

Conclusions:

  • Alcoholic blackouts are reported frequently in general populations.
  • The lower incidence in traffic-control studies, especially during accidents, suggests blackout claims may serve a strategic purpose.
  • Both denial and claims of alcoholic blackouts can function strategically, particularly in legal or high-stakes situations.