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Related Experiment Videos

The overconfidence effect in social prediction.

D Dunning1, D W Griffin, J D Milojkovic

  • 1Department of Psychology, Cornell University, Ithaca, New York 14853.

Journal of Personality and Social Psychology
|April 1, 1990
PubMed
Summary
This summary is machine-generated.

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People consistently overestimate their accuracy when predicting others' behaviors. This overconfidence in social prediction occurs even when individuals have limited information, highlighting a common cognitive bias.

Area of Science:

  • Social Psychology
  • Cognitive Psychology
  • Behavioral Science

Background:

  • Accurate social prediction is crucial for interpersonal interactions.
  • Understanding judgmental biases is key to improving decision-making.

Purpose of the Study:

  • To investigate the accuracy of social predictions.
  • To identify the extent and sources of overconfidence in predicting peer responses.

Main Methods:

  • Five studies involved subjects predicting peer responses to various situations.
  • Subjects provided confidence estimates for each prediction, validated through a "gamble" task.
  • Prediction accuracy was compared against confidence levels across different information conditions.

Main Results:

Related Experiment Videos

  • Subjects consistently demonstrated high overconfidence in their social predictions.
  • Accuracy levels fell significantly below expressed confidence levels.
  • Overconfidence was linked to high confidence levels and predictions deviating from base rates.

Conclusions:

  • Overconfidence is a pervasive bias in social prediction.
  • Understanding the sources of overconfidence can inform strategies for more calibrated judgments.
  • Further research is needed to explore theoretical and normative implications.