Asch - majority influence

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  • Asch - majority influence
    • Asch's vision test
      • Aim - would real ppts conform to majority influence on an unambiguious task
      • 123 male american students
        • PPT's seated around a table and looked at two cards.
          • 1) one vertical line
          • 2) three vertical lines of different lengths
          • All but one ppts were confederates
          • In turn each ppts called out which of the three lines were the same length
            • The reall ppts called out last
            • The confederates gave wrong answers on 12/18 trials.
              • Critical trials
              • F= 12 CT 33% made by real ppts were incorrect
              • F= 25% of ppts never conformed
      • PEI = ppts changed their public behaviour to avoid disapproval from other group members
    • Variations
      • Difficulty of task
        • Difference between the lines made smaller = increased difficulty = increased conformity
      • Size of majority
        • Less confeds = conformity dropped to 30%
      • Unaminity of the majority
        • Partner reduced conformity from 32% to 5.5%
    • Methodological issues
      • Only used male american students
        • Can't generalise the findings to anyone outside this catagory
          • Lack ecological validity
            • Lacks historical validity
              • Cnat generalise to modern day society
    • No wider picture
      • Only shows us how people conform under special circumstance
        • Saying out loud - risk looking silly
          • Low validity
    • Ethical issues
      • Although deception was used ppts were debreifed and offered the right to withdraw their data from the study afterwards
    • Artficial study
      • Lab based experiment with an artificial task that wouldnt resemble real life
        • Low mundane realism

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