Yarmey (2004)

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  • Yarmey (2004)
    • Aims
      • to look at the effects of a disguise on identification in a line-up
      • to see if knowning you are taking part in a study would affect idnetification in a line-up
      • to see if time effected identification
    • Procedure
      • 215 males and 375 females
      • from 18-70
      • they were randomly assigned to a condition
      • Two women would approach the participant
      • They asked them if they had seen any jewellery or for directions
      • After 2 minutes the participant would be approached by the second female researcher
      • They ever asked participants to identify the woman then or 4 hours later
      • Witnesses were given a questionnaire
      • They were then given six photos and asked to identify the woman
      • Students were also given the aims of the study and asked to guess what would happen
      • All participants were debriefed at the end
    • Results
      • When the woman was in the photo line-up 49% participants correctly identified her.
      • When the woman was not in the line-up 62% correctly identified this
      • Participants who were prepared for the test had better recall
    • Conclusions
      • Participants accounts were right aorund 50% of the time
      • Findings correspond with Haber and Haber's (2001) study
      • There are practical applications
    • Evaluation
      • Strengths
        • There is reliability because findings support Haber and Baber's (2001) study
        • The study has some ecological validity
        • The study was well controlled so can be replicated to test for reliability
        • Because of the broad range of participants findings can be generalised
      • Weaknesses
        • Yuillie and Cutshall (1986) found that EWT was accurate
        • It does lack some ecological validity
        • The findings can only be generalised to similar situations

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