Abstract
Previous studies have shown that pleasant weather conditions can improve people's mood and facilitate positive social relationships. The current study tested the effect of sunshine on drivers' willingness to give hitchhikers a ride. Four confederates (2 men, 2 women; M age = 20 yr.) acted as hitchhikers on the roadside in France, on sunny and cloudy days. To minimize the influence of other important variables, hitchhiking was conducted only when it was not raining and only when the external temperatures were between 20° and 24 °C. Motorists' behavior in 2,864 hitchhiking events was analyzed. The results showed that both male and female drivers stopped more on sunny days than on cloudy days for both male and female hitchhikers. Perhaps the positive mood induced by the sunshine promotes helping behaviors.
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