小孩和猩猩使用相同记忆法
Infants and Apes Remember Things Similarly
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　　 Infants and apes apparently adopt the same tactics for remembering where things are, but as children develop their strategies change, a new study shows.

　　一项新的研究显示，小孩和猿使用同样的方法来记忆物品所在的地方，但是当孩子们越长越大，他们的方法就会改变。

　　The findings might reveal in part how the minds of our distant ancestors shifted gears to embark on the road toward humanity.

　　这些发现也许能在一定程度上说明我们的远祖是如何转舵走上“人性”的道路。

　　There are two basic strategies animals use to remember where things are. Either they remember a thing's features, such as whether it was a banana, or they remember its place in space, such as left.

　　动物记忆物品位置的方法有两种。一种是通过记忆物品的特点，例如它是否是一个香蕉；另一种则是通过记忆物品所在的空间位置，例如是否在左边。

　　All animals scientists have tested seem to employ both strategies. However, if experiments are rigged such that animals had to choose between the tactics, some species, such as chickens and toads, prefer a feature-based strategy. Others, such as fish and dogs, favor a place-based strategy.

　　受测的科学家们会同时采取两种方法。但是在同样的实验中，动物们则会选择其中一种，一些物种，例如鸡和蟾蜍会选择特点记忆法。其他的，例如鱼和狗更喜欢空间记忆法。

　　Researcher Daniel Haun at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany and his colleagues investigated orangutans, gorillas, bonobos, chimpanzees and humans. They wanted to see whether humanity and its closest relatives all adopted the same strategies for remembering where things are. Any changes in strategy between species or within species would shed light on how they all evolved.

　　德国莱比锡普朗克演化人类学研究所研究人员丹尼尔·焕和同事们分别对猩猩、大猩猩、倭黑猩猩、黑猩猩和人类进行了研究。他们希望了解人类是否会和他们最近的“亲戚”选择同样的记忆方法。不同物种之间和同一物种间的方法改变都能说明演化的过程。

　　At the Leipzig Zoo, the scientists hid rewards such as grapes, banana slices or toy animals under either a hollow piece of wood, an imitation bird's nest or an artificial hollow rock.
　
　

　　在莱比锡动物园，科学家们把如葡萄、香蕉片、动物玩具等奖品放入空木头、假鸟窝或者人造空石头里面。

　　At times, the rewards were concealed(11) under the same object they were hidden beneath previously, whose place had changed. A feature-based strategy would best find these coveted items.

　　当研究人员用同样的掩饰物藏匿奖品，只是改变了它们的位置的时候，善用特点记忆法的动物很容易找到这些诱人的奖品。

　　At other times, the rewards were hidden at the same place they were concealed before, but under a different object. A place-based strategy would best discover these items.

　　当研究人员没有移动物品，只是改变了藏匿物品的掩盖物的时候，善用空间记忆法的动物则能很快发现物品。

　　When human infants are a year old, they favor place-based strategies like all the other great ape species do. This suggests human and ape brains start out the same, at least when it comes to remembering where things are. The most recent common ancestors between humans and all the other great apes date back to about 15 million years ago, suggesting this common preference has been part of our brain structures since at least then.

　　一岁左右的小孩和猿类一样选择空间记忆法。这说明至少在物品位置记忆方面，人类和猿类大脑最初是一样的。可证明的人类和猿类拥有共同祖先的最近时间是1500万年前，也就是说至少从那个时候起，人类和猿类就拥有同样的记忆方法。

　　However, three-year-old children preferred a feature-based strategy. The researchers noted this shift in strategy coincided with a period when humans are first drawn into social life and acquire skills such as spoken language.

　　但是，三岁的小孩就会选择特点记忆法。研究人员说这种转变正与人类刚刚步入社会生活相对应，那个时候人们学会了很多技能，例如说话。