Observing many researchers using the same data and hypothesis reveals a hidden universe of uncertainty
Observing many researchers using the same data and hypothesis reveals a hidden universe of uncertainty
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Date
2022
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Breznau, Nate
Rinke, Eike Mark
Wuttke, Alexander
Lersch, Philipp M.
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Proceedings of the National Academy of Sciences of the United States of America (PNAS) ; 119 (2022), 44. - e2203150119. - National Academy of Sciences. - ISSN 0027-8424. - eISSN 1091-6490
Abstract
This study explores how researchers' analytical choices affect the reliability of scientific findings. Most discussions of reliability problems in science focus on systematic biases. We broaden the lens to emphasize the idiosyncrasy of conscious and unconscious decisions that researchers make during data analysis. We coordinated 161 researchers in 73 research teams and observed their research decisions as they used the same data to independently test the same prominent social science hypothesis: that greater immigration reduces support for social policies among the public. In this typical case of social science research, research teams reported both widely diverging numerical findings and substantive conclusions despite identical start conditions. Researchers' expertise, prior beliefs, and expectations barely predict the wide variation in research outcomes. More than 95% of the total variance in numerical results remains unexplained even after qualitative coding of all identifiable decisions in each team's workflow. This reveals a universe of uncertainty that remains hidden when considering a single study in isolation. The idiosyncratic nature of how researchers' results and conclusions varied is a previously underappreciated explanation for why many scientific hypotheses remain contested. These results call for greater epistemic humility and clarity in reporting scientific findings.
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000 General, Science
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metascience, many analysts, researcher degrees of freedom, analytical flexibility, immigration and policy preferences
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BREZNAU, Nate, Eike Mark RINKE, Alexander WUTTKE, Sharon BAUTE, Sebastian HELLMEIER, Christian HUNKLER, Philipp M. LERSCH, Philipp LUTSCHER, Matthias MADER, Julian SEURING, Nadja WEHL, 2022. Observing many researchers using the same data and hypothesis reveals a hidden universe of uncertainty. In: Proceedings of the National Academy of Sciences of the United States of America (PNAS). National Academy of Sciences. 119(44), e2203150119. ISSN 0027-8424. eISSN 1091-6490. Available under: doi: 10.1073/pnas.2203150119BibTex
@article{Breznau2022-11Obser-59671, year={2022}, doi={10.1073/pnas.2203150119}, title={Observing many researchers using the same data and hypothesis reveals a hidden universe of uncertainty}, number={44}, volume={119}, issn={0027-8424}, journal={Proceedings of the National Academy of Sciences of the United States of America (PNAS)}, author={Breznau, Nate and Rinke, Eike Mark and Wuttke, Alexander and Baute, Sharon and Hellmeier, Sebastian and Hunkler, Christian and Lersch, Philipp M. and Lutscher, Philipp and Mader, Matthias and Seuring, Julian and Wehl, Nadja}, note={Article Number: e2203150119} }
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