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Practice and feedback effects on the confidence-accuracy relation in eyewitness memory.

T J Perfect1, T S Hollins, A L Hunt

  • 1Department of Psychology, University of Plymouth, UK. tperfect@plymouth.ac.uk

Memory (Hove, England)
|August 10, 2000
PubMed
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Eyewitnesses can improve their confidence-accuracy relation by practicing with feedback. This training helps calibrate their self-assessment, enhancing the link between confidence and accuracy in eyewitness memory.

Area of Science:

  • Cognitive Psychology
  • Forensic Psychology

Background:

  • Eyewitness testimony is crucial in legal proceedings.
  • A weak confidence-accuracy relation in eyewitnesses can lead to miscarriages of justice.
  • Existing research suggests eyewitnesses often lack self-awareness regarding their memory performance.

Purpose of the Study:

  • To investigate if providing feedback on relative performance can improve the confidence-accuracy relation in eyewitness memory.
  • To determine if practice alone is sufficient to enhance this relation.

Main Methods:

  • Two experiments were conducted using successive eyewitness tests.
  • Experiment 1 involved recall of events; Experiment 2 involved face recognition.
  • Participants received either practice alone or practice with feedback on their performance relative to others.

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Main Results:

  • Practice alone did not significantly improve the confidence-accuracy relation.
  • Practice with feedback led to robust increases in the confidence-accuracy relation.
  • This indicates that calibration, informed by feedback, is key.

Conclusions:

  • Lack of calibration, specifically poor knowledge of relative expertise, contributes to the weak confidence-accuracy link in eyewitness memory.
  • Feedback-based training can effectively enhance the reliability of eyewitness confidence.
  • Interventions aimed at improving eyewitness self-assessment are vital for legal accuracy.