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Over the years, public awareness programs have sought to educate people about the dangers of excessive sun exposure and to promote protective measures. One of the best programs is SunSmart, a 20-year-old program in Australia, where the skin cancer rates are the highest in the world. Studies of the effectiveness of this program, and others sponsored by the American Academy of Dermatology and the American Cancer Society, have yielded conflicting results. To eliminate response bias caused by interview subjects who may model their responses to fit expectations about sun-protective behavior, investigators in Australia performed an observational field study of clothing worn by individuals aged 14 and older while engaged in outdoor recreational ac…