Climate scientists’ wide prediction intervals may be more likely but are perceived to be less certain

Løhre, E., Juanchich, M., Sirota, M., Teigen, K. H. and Shepherd, T. G. ORCID: https://orcid.org/0000-0002-6631-9968 (2019) Climate scientists’ wide prediction intervals may be more likely but are perceived to be less certain. Weather, Climate and Society, 11 (3). pp. 565-575. ISSN 1948-8327 doi: 10.1175/WCAS-D-18-0136.1

Abstract/Summary

The use of interval forecasts allows climate scientists to issue predictions with high levels of certainty even for areas fraught with uncertainty, since wide intervals are objectively more likely to capture the truth than narrow intervals. However, wide intervals are also less informative about what the outcome will be than narrow intervals, implying a lack of knowledge or subjective uncertainty in the forecaster. In six experiments, we investigate how lay people perceive the (un)certainty associated with wide and narrow interval forecasts, and find that the preference for accuracy (seeing wide intervals as “objectively” certain) vs. informativeness (seeing wide intervals as indicating “subjective” uncertainty) is influenced by contextual cues (e.g., question formulation). Most importantly, we find that people more commonly and intuitively associate wide intervals with uncertainty than with certainty. Our research thus challenges the wisdom of using wide intervals to construct statements of high certainty in climate change reports.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/83185
Identification Number/DOI	10.1175/WCAS-D-18-0136.1
Refereed	Yes
Divisions	Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
Publisher	American Meteorological Society
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