Researchers from the University of Oregon and the University of Wisconsin designed two studies looking at food preferences. In the first, mothers of 31 male and 36 female preschoolers completed a survey of their children?s preferences for foods high in sugar, fat and salt. Their children were shown cards featuring 11 natural foods (such as apples and green beans) and 11 flavor-added foods (such as cheese puffs, jelly beans and ketchup) and asked to rate them on a five-point scale of facial expressions: a big frown indicated a great dislike to something and a big smile indicated they really liked the taste. None of the pictures of food showed any packaging.
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