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var digg_url = 'http://digg.com/autos/Red_cars_LOUDER_than_blue_cars'; How much does color factor into your perception of how loud a car actually is? If a recently-conducted experiment is any indication, it plays a significant part, indeed. Sixteen individuals were told to listen to the sound of a car's engine while being shown photographs of identical cars in red, blue, light green, or dark green. The sounds were played at four different volume levels throughout the testing. The findings sho

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