A Difficult Hill
Researchers at the University of Virginia have found that most people perceive a hill to be steeper than it really is, especially if they’re tired or carrying a heavy load. When asked to estimate the slope of a hill, test participants consistently misjudged it, thinking a 10-degree slant was about 30 degrees, and rating a 5-degree slope as nearly 20 degrees. Hardly any of them believed they could be that far off.
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