Evidence of alcohol induced weapon focus in eyewitness memory

We examined the effects of acute alcohol on eyewitness memory for a simulated armed robbery under laboratory conditions. Alcohol and placebo participants viewed a slide series showing a target male taking a laptop from a helpdesk assistant, either on loan or at gunpoint. Following a brief retention period, participants responded to central multiple-choice questions, about the target's actions face and clothing, and peripheral questions about other scene features. Alcohol participants shown the no-weapon scene displayed poorer peripheral memory than placebo controls, though alcohol did not impair peripheral memory among weapon scene viewers. Alcohol participants also showed a weapon focus effect, providing less accurate responses to central questions related to details about the target male than no-weapon controls. These findings are consistent with alcohol myopia theory and suggest intoxicated eyewitnesses may be more susceptible to weapon focus than sober counterparts.

Automated summary

The study found that acute alcohol has an impact on eyewitness memory of armed robbery. Alcohol participants showed poorer peripheral memory in scenes without weapons and displayed a weapon focus effect, providing less accurate responses to central questions related to details about the target male.