The goal was to collect as many good cards as possible in an unspecified short period of time.
小组的目标就是在给定的时间段内搜集尽可能多的绿色卡片。
As an incentive, members of the best-performing group would receive an animal-adoptionprize worth £30 .
作为鼓励,表现最好的小组将获得价值30英镑的动物领养奖励。
Before the modern-day foragers were let loose, radio-frequency tags, like those used inswipe cards, were wrapped around everyones 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 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 on top of the boxes and in the home base, allowed Dr Kingto 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 aconsensus, 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。
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