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Two field studies on the effects of alcohol on eyewitness identification, confidence, and decision times
Author(s) -
Sauerland Melanie,
Broers Nick J.,
Oorsouw Kim
Publication year - 2018
Publication title -
applied cognitive psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.719
H-Index - 100
eISSN - 1099-0720
pISSN - 0888-4080
DOI - 10.1002/acp.3493
Subject(s) - overconfidence effect , psychology , eyewitness identification , social psychology , test (biology) , identification (biology) , blood alcohol , developmental psychology , poison control , injury prevention , medical emergency , medicine , paleontology , botany , database , relation (database) , computer science , biology
Summary In two field studies, bar tenants ( N s = 86 and 190, respectively) were successively approached by confederates C1 and C2 on a night out. Confederate C3 then presented participants with a six‐person target‐absent or target‐present lineup concerning C1 or C2 (immediate test). Several days later, participants viewed a lineup regarding the confederate they had not attempted to identify earlier (C1/C2; delayed test). An immediate compared with a delayed, sober identification test did not increase the risk of a false identification decision. A blood alcohol concentration of 0.06–0.07% best discriminated accurate from inaccurate decisions. Choosers with a blood alcohol concentration ≤ 0.06% showed excellent calibration and little overconfidence, and their confidence was a strong indicator of accuracy (i.e., good resolution). Choosers with a higher intoxication level displayed poor calibration and strong overconfidence. Nonchoosers were generally poorly calibrated. Combined analyses showed a negative effect of intoxication on one's ability to discriminate the target from nontargets.

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