few years ago, for a study published in 2008 in the Journal of Experimental Social Psychology, researchers asked thirty-four University of Virginia students to wear weighted backpacks and estimate the incline of a steep (26-degree) hill. The guesses were wildly inaccurate, which is no surprise. People have as hard a time estimating angles as they do estimating how many hours they work or sleep. What is surprising is that students who were standing next to their friends perceived the hill as much less steep than students who stood alone did. When asked to estimate the angle, those with friends
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