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谁说鸽子老实本分 原来它们天生爱“Dubo”！
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[font=Arial, Helvetica, sans-serif, ����][size=14px]- C8 J. _7 U l7 U
觅食理论告诉我们，动物们往往对“一鸟在手胜过双鸟在林”这句话深信不疑，因为成功吃到食物毕竟是生存的关键，所以它们自然不会冒不必要的风险。不过，最近的一项研究却发现，给人温顺印象的鸽子似乎不愿意谨慎行事，而是天生爱Dubo!
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/ v+ d# }9 _; b5 C: T, M美国《科学美国人》杂志近日援引了一项刊登在《皇家科学月刊》上的研究表明，鸽子在选择食物时容易禁不住诱惑，存在与人类类似的“Dubo”行为。
8 J4 [6 [0 l- f Z9 `1 D8 G8 g2 d' Y美国研究人员为鸽子设计了一个“Dubo”实验，即在获取食物时有两种选择，并让鸽子们在两种选择之间“下赌注”。
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在标志1处，鸽子一定可以获得3粒食物，但标志2处则是个未知地带，如果选择了该处，鸽子有20%的机会获得10粒食物，但80%的情况下则没有食物。虽然总体而言，第二项选择得到的食物更少，但科学家们发现，“头奖”对鸽子的诱惑非常大。结果显示，参与研究的80%的鸽子都选择了“赌一把”——飞到标志2处。$ z6 l$ r/ h" m. D
科学家称，这项研究表明鸽子会为了获得更大的回报而放弃一些近在眼前的好处，而这与人类的Dubo行为非常相似。“所以，就算在鸟儿那毫无想象力的脑袋瓜里，它们也会梦想着天上掉馅饼这种美事儿。”1 X6 L& x0 N; n: ?* W+ n; B c+ k6 ~
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