Cards (4)

    • Background
      Researcher suggested that the context could bias their decisions and lead to errors being made.
    • Participants
      5 volunteer fingerprint experts consented to being studies for 12 months. unfamiliar with mayfields prints
    • Procedure
      They were given a pair of prints that they had unknowingly identified as a match 5 years earlier. They were told they were the pair of prints wrongly identified by the FBI as the Madrid bomber. Only 20% agreed that original decision on that pair was a definite match. Other 80% contradicted their original decision on their prints. 3= a definite non-match 1= insufficient evidence to make a match.
    • Conclusions
      4-5 had been affected by contextual info they had been given. Had been affected by cognitive bias.
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