The results of three psychological studies suggest that many people did not understand probability of precipitation (PoP) despite the fact that participants were college undergraduates in the Pacific Northwest, an area with frequent precipitation forecasts. The misunderstanding concerned the class of events to which the probability refers.The combined results reported here suggest that some participants thought that the percentage, indicating chance of precipitation, referred instead to the proportion of area or time that precipitation would be observed. More participants chose to take an umbrella or wear a hooded jacket who mistakenly interpreted the forecast as indicating precipitation for more than half of the area or time as compared to those who do not hold this misunderstanding. In addition, performance only improved significantly when PoP was accompanied by a phrase expressing the probability of no precipitation. This suggests a deep-seated misunderstanding that converts the probabilistic forecasts into a deterministic forecast for precipitation with additional information about percent time or area and affects decision making. We conclude that it is important to convey the idea that PoP is a forecast in which it is possible that no precipitation will be observed at all and make suggestions about extending uncertainty forecasts to other parameters.
Bulletin of the American Meteorological Society – American Meteorological Society
Published: Feb 17, 2009
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera