Jenness (1932)

• Aim

  Investigate whether individuals change opinion in ambiguous situation, in response to group discussion.
• Procedures

  • Jen used ambig situ that involved full jar of 811 white beans.
  • 101 Psych students used.
  • PPs individually estimated how many beans jar contained. PPs divided into group to discuss group guess.
  • After discussion, PPs asked to individually guess number to see if og answer changed
• Findings

  • Nearly all PPs changed og answer.
  • Average M PPs changed answers by 256 beans + F PPs by 382 beans
• Conclusion

  • Result suggests PPs changed answers due to ISI, they believed group estimates more likely correct to their own.