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Prior storm experience moderates water surge perception and risk
Gregory D Webster1, Duzgun Agdas, Forrest J Masters
1Department of Psychology, College of Liberal Arts and Sciences, University of Florida, Gainesville, Florida, USA. gdwebs@gmail.com
Plos One
|June 6, 2013
Summary
People overestimate extreme water speeds, with higher speeds and depths increasing this misperception. This influences perceived risk, crucial for flood and cyclone warnings.
Area of Science:
- Environmental Psychology
- Fluid Dynamics
- Human Perception
Background:
- Limited research exists on human perception of extreme water speeds and associated risks.
- Previous studies focused on water's impact on stability rather than perceptual accuracy.
- This study is the first to experimentally investigate risk perception in moving water across varying speeds and depths.
Purpose of the Study:
- To determine the accuracy of human perception of extreme water speeds.
- To investigate how water depth and speed influence perceived risk.
- To explore the relationship between perceived water speed and perceived risk.
Main Methods:
- A randomized within-person experiment was conducted with 76 participants.
- Participants were exposed to moving water at two depths (0.45 m, 0.90 m) and three speeds (0.4, 0.8, 1.2 m/s).
- Participants estimated water speed and their perceived level of risk.
Main Results:
- Perception of water speed was overestimated, with overestimation increasing at higher speeds and depths.
- Perceived risk increased with actual water speed, mediated by perceived speed.
- Prior experience with natural disasters (rip currents, cyclones) moderated the accuracy of water speed perception.
Conclusions:
- Accurate perception of water speed is challenging, particularly in extreme conditions.
- Understanding these perceptual biases is vital for effective risk communication.
- Findings can inform public safety messaging for floods and tropical cyclones.
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