Beyond the confidence-accuracy relation: A multiple-reflector-variable approach to postdicting accuracy on eyewitness...

Area of Science:

• Psychology
• Forensic Science
• Cognitive Science

Background:

• Eyewitness identification is crucial in legal proceedings.
• Distinguishing accurate from inaccurate eyewitness decisions is a persistent challenge.
• Previous research focused on individual behavioral cues.

Purpose of the Study:

• To investigate if combining witness confidence, decision time, and justification language improves accuracy prediction in eyewitness lineups.
• To assess the postdictive power of these behaviors for both identifications and rejections across simultaneous and sequential lineups.

Main Methods:

• Examined witness confidence, decision time, and justification language.
• Assessed the accuracy of eyewitness decisions (identifications and rejections).
• Utilized simultaneous and sequential lineup procedures.
• Employed classification models to analyze behavioral data.

Main Results:

• Confidence, decision time, and language independently predicted eyewitness decision accuracy.
• Combining all three behaviors maximized the ability to distinguish accurate from inaccurate decisions.
• Witness language revealed a distinction between absolute (accurate) and relative (inaccurate) judgment strategies.
• This pattern held for both simultaneous and sequential lineups.

Conclusions:

• Accurate eyewitnesses exhibit confidence, speed, and employ absolute-judgment strategies in their language.
• Inaccurate eyewitnesses tend to be less confident, slower, and use relative-judgment language.
• Sequential lineups may hinder accurate identification by making it harder to assess the best memory match, rather than promoting absolute judgments.