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The replicability revolution.

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  • 1Department of Psychology,University of Toronto,Mississauga,ON L5L 1C6,Canada.Ulrich.schimmack@utoronto.cahttps://replicationindex.wordpress.com/.

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Psychology faces a replicability crisis due to significance testing. Reporting all studies, not just significant ones, would improve replication accuracy and reduce controversy in psychological research.

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Area of Science:

  • Psychological Science
  • Research Methodology

Background:

  • The field of psychology is currently experiencing a significant 'replicability revolution'.
  • Numerous high-profile replication studies have reported failures, raising concerns about the reliability of psychological findings.
  • A key factor contributing to these replication failures is the prevalent practice of significance selection in original studies.

Purpose of the Study:

  • To investigate the impact of significance selection on the outcomes of psychological research.
  • To explain why replication studies in psychology frequently fail to reproduce original findings.
  • To propose a solution for reducing contention surrounding replication studies.

Main Methods:

  • This analysis examines the role of statistical significance in the publication and replication of psychological research.
  • It contrasts the expected failure rates of original studies with those of replication studies under current practices.
  • The study discusses the implications of reporting all conducted studies, irrespective of their statistical significance.

Main Results:

  • Replication failures in psychology are largely attributed to the selection of original studies for statistical significance.
  • If all studies, including non-significant ones, were reported, the rate of significant results would align more closely between original and replication studies.
  • The practice of significance selection inflates the perceived success rate of original research.

Conclusions:

  • Replication studies in psychology would be less contentious if original results were not selectively reported based on significance.
  • Adopting a more transparent reporting system, including non-significant findings, is crucial for enhancing the credibility and reproducibility of psychological science.
  • Addressing significance selection bias is essential for navigating the ongoing replicability crisis in psychology.