Researchers conducted double-blind studies with children and determined that genetics have a much greater influence on hyperactive dispositions than a sweet-tooth diet.

研究人员进行了双盲的比对实验，结果表明基因对多动的影响比吃糖大多了。

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But it turns out there are some small but well-conducted double-blind studies demonstrating significant reductions in migraines in people taking one of these supplements.

但结果是有虽然小但是反映良好的双盲测试证明吃任意一种营养品的人，偏头痛症状确实有明显减轻。

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Studies that were often double-blind and placebo-controlled.

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The idea of blind obedience isn't as important in these studies as the larger message about the power of the situation, Burger said.

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Susan Goldin-Meadow, author of Hearing Gesture: How Our Hands Help Us Think, points out clinical studies that reveal that even deaf and blind infants gesture when they are making sounds.

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