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Area of Science:

  • Psychology
  • Scientific Self-Correction
  • Belief Updating

Background:

  • Science relies on self-correction, where scientists update beliefs with new evidence.
  • However, individuals often resist changing their established beliefs.
  • Replication studies are crucial for scientific self-correction.

Purpose of the Study:

  • To examine belief updating in research psychologists following large-scale replication projects.
  • To assess whether psychologists' belief updates align with empirical evidence.
  • To investigate factors influencing belief updating in response to replication outcomes.

Main Methods:

  • Tracking research psychologists' beliefs before and after four major replication projects.
  • Comparing observed belief changes to predictions and Bayesian model expectations.
  • Analyzing the influence of factors like personal investment, expertise, and intellectual humility.

Main Results:

  • Psychologists updated their beliefs, but to a lesser extent than a Bayesian model predicted.
  • Belief updating occurred at levels consistent with psychologists' own predictions.
  • No evidence suggested increased skepticism towards replications that contradicted prior beliefs; intellectual humility showed a small positive association with belief updating.

Conclusions:

  • Replication studies can facilitate self-correction within the field of psychology.
  • Psychologists may systematically underweight the evidential value of replication findings.
  • Further research is needed to understand and potentially enhance belief updating mechanisms in response to replication data.