经济学人134:形体政治学

 　　Science and technology

　　科学及技术
　　Human communication
　　人类交流
　　Gesture politics
　　形体政治学
　　People talk a lot, but their hand signals may convey more useful information
　　虽然人类主要通过语言交流，但是一些手势往往能传达更多有用的信息。
　　Silence is golden
　　沉默是金
　　IT IS received wisdom that humanity owes a lot of its evolutionary 1 success to its remarkable 2 ability to communicate.
　　人类在进化上的成功大部分归功于其非凡的交流能力已经成为一个被接受的常识。
　　So much so, in fact, that few have bothered to test this hypothesis in any systematic 3 way.
　　尽管如此，事实上还没有人系统地验证过这一假设。
　　Now, a group of researchers led by Andrew King, of the Royal Veterinary College in Britain, has tried to plug this gaping 4 hole.
　　如今，一个由“英国皇家兽医学院”的安德鲁.科恩率领的研究小组正尝试填补这块空缺。
　　Their first results have just been published in Biology Letters.
　　他们的第一个研究成果被发表在了《生物学快报》上。
　　Hunter-gatherers’ practice of scouring 5 their surroundings for edible 6 plants is responsible for half of the name anthropologists have bestowed 7 on them.
　　采猎者搜集居住区周围可食用植物的行为应了人类学家赋予他们的名字中的一半的内容。
　　And for good reason.
　　而出于此理由，
　　With hunting likely to have been an intermittent 8 diversion, effective foraging 9 would have been crucial to tiding early humans over to the next woolly mammoth 10.
　　狩猎可能变成了一种间歇性的活动，而有效的搜集活动对于帮助早期人类渡过冰河时期起到了关键作用。
　　So Dr King and his colleagues conducted a study to see how, if at all, communication enhances foraging prowess.
　　所以，科恩博士及其同事主持了这项研究活动以确认交流是如何促进搜集技巧的。
　　They recruited 121 visitors to, rather appropriately, the London Zoo, and split them into 43 groups.
　　他们邀请了大约121名游客访问伦敦动物园，并将他们分成了43个小组。
　　Each group contained between two and seven people.
　　每个小组的成员在2到7人之间，
　　Some were single-sex and some mixed.
　　且有的为单一性别，有的为男女混合搭配。
　　Some were composed of family and friends whereas others brought together complete strangers.
　　部分小组由亲戚朋友组成，其他则完全是陌生人。
　　Half the groups were allowed to communicate freely.
　　在这些小组中，一半可以进行自由交流，
　　The rest were told to exchange no verbal signals or gestures of any kind.
　　另一半择不允许通过声音信号以及任何肢体动作进行交流。
　　Each group was then asked to a room containing six foraging patches—boxes filled with 300 cards, some green and some white—arranged at a distance from a central home base.
　　每个小组会被邀请到一个设置了6个搜集区---也就是盛有300张绿色和白色卡片的盒子的房间，这些盒子被放置在离中心基地区域一定距离的地方。
　　The green cards were defined as good and the patches varied 11 from 5% to 95% green.
　　绿色的卡片为最好，每个搜集区所含绿色卡片的比例由5%到95%不等。
　　The foragers could not see inside the boxes and were allowed to pick only one card at a time, through a hand hole, using their dominant 13 hand.
　　搜集者看不到盒子的内部情况并且只能惯用手从小孔处一次取出一枚卡片。
　　There were no restrictions 14 on which patches to visit, but each time a card was plucked it had to be returned to the home base, irrespective of colour.
　　对于访问哪个搜集区并没有设置限制，但是每次卡片在取出之后无论是什么颜色，都必须送回基地区域。
　　The goal was to collect as many good cards as possible in an unspecified short period of time (all trials actually lasted ten minutes).
　　小组的目标就是在给定的时间段内（事实上每次尝试持续10分钟）搜集尽可能多的绿色卡片。
　　As an incentive 15, members of the best-performing group would receive an animal-adoption prize worth ￡30 ($47).
　　作为鼓励，表现最好的小组将获得价值30英镑（47美元）的动物领养奖励。
　　Before the modern-day foragers were let loose, radio-frequency tags, like those used in swipe cards, were wrapped around everyone’s dominant wrist.
　　原始社会的搜集者比较分散，所以每个成员惯用手的手腕上都配带了一个与磁卡无线电标签相似的标签。
　　All the good forage 12 cards were similarly tagged.
　　所有绿色卡片上同样安置了相同的标签。
　　These, together with antennae 16 on top of the boxes and in the home base, allowed Dr King to track the group members’ precise movements.
　　这些标签和卡片盒上以及基地区域内安置的天线使得科恩博士可以精准地追踪每个小组的行动。
　　That, in turn, made it possible to determine how long it took each group to reach a consensus 17, defined as concentrating more than 90% of activity around a single patch.
　　从而，有可能确定每个小组需要花多长时间来达成共识，即该小组95%的活动都集中在一个搜集区内。
　　Unsurprisingly, the groups that were allowed to communicate proved the more effective foragers.
　　事实证明，那些可以进行交流的小组的搜集者效率相对较高。
　　They were much likelier than their non-communicating peers to converge 18 on the greenest patches.
　　这也并让人感到不惊讶。与其他不可以进行交流的竞争者相比，他们更有可能汇聚在绿色卡片最多的搜集区。
　　What did come as something of a surprise, however, was the nature of the communication that mattered.
　　然而让人感到惊讶的却是他们交流的方式。
　　The researchers monitored noise levels and hand gestures.
　　研究者对他们使用发出的噪音以及手势进行了监测。
　　Noise levels served as a proxy 19 for verbal communication; gestures, for the non-verbal sort.
　　噪音可以作为有声交流的替代方式，而手势则对应无声交流。
　　Dr King found that the only thing which explained the probability of lighting 20 on the best patch was gesture use, which peaked just before consensus was reached.
　　科恩博士发现唯一可以用来解释存在选择最好搜集区的可能性的原因是肢体语言的使用，并且这种肢体语言的使用在共识达成之前就已经达到了顶峰。
　　Noise levels remained more or less constant the whole time, suggesting that verbal messages were not as important.
　　在整个时间段内，噪音断断续续地得到了持续使用，这显示有声信息并不是那么重要。
　　Constant volume may hide the variable importance of what was said.
　　不间断的声音可能会影响不同重要性语言的传达。
　　So, Dr King plans to repeat the experiment, controlling for the meaning of both utterances 21 and gestures.
　　所以，科恩博士计划重复试验，以确认发音和肢体语言的意义。
　　Moreover, hand gestures are a relatively 22 local signal.
　　况且，手势是一种相对本土化的信号。
　　It remains 23 an open question whether they are as crucial to success in groups larger than the half-dozen or so people typical of foraging parties in hunter-gatherer societies. Spoken contributions allow information to be disseminated 24 rapidly to group members far away.
　　在采猎者社会群落中，典型的搜集者人数大约占到了一半左右，对于那些人数多于搜集者的群落，手势是对于这些人的成功能否起到同样的关键作用仍然是一个问题。
　　That may trump 25 the importance of non-verbal messages as groups grow larger.
　　声音可以将信息快速地传播给远处的部落成员。并且随着群落的壮大，语言信息的重要性将超过非语言传递信息的重要性。
　　But if gestures convey some vital extra information, people in larger groups may limit their communication to nearby co-foragers.
　　但是，如果肢体语言可以传达一些额外的重要信息，那么在较大群落中，人们会将交流范围仅限于附近的搜集者。
　　This might lead to the emergence 26 of subgroups.
　　从而导致此次群落的出现。
　　How all this pertains 27 to the “hunter” in “hunter-gatherer” has yet to be investigated.
　　关于以上这些是如何影响采猎群落中的狩猎者目前还没有相关调查。
　　Getting a project on that past an ethics 28 committee might involve an interesting act of communication in its own right.
　　如果绕开道德层面来开展研究项目，其本身就是一种有趣的交流方式。