关于富裕程度和群体规模的类人社会修饰策略的演变
Evolution of Human-like Social Grooming Strategies regarding Richness and Group Size
摘要：
人类倾向于与亲密的朋友合作，因此他们必须建立强大的社会关系来获得他人的合作。因此，他们的社会关系建构策略应该是经过一个进化过程而形成的。这种社会关系建构的行为被称为“社会修饰”。“在本文中，我们表明，有四个类，包括一个类似人类的战略，在进化动力学的社会梳理策略的基础上，进化游戏模拟。社会关系强度（以社会梳理的频率衡量）通常显示出一个非常倾斜的分布（幂律分布）。这可能是由于时间成本对社会修饰的限制，因为成本太大，无法忽视有许多强大的社会关系。人类构建社会关系的策略的进化可以解释基于社会脑假说的人类智力的起源。我们构建了一个以个体为基础的模型来探索社会修饰策略的进化动力学。该模型基于通过加强与合作者的社会关系来赢得他人的行为。进化模拟的结果显示了四类进化动力学。结果取决于总资源和每个合作者的资源的合作者的数量的比率。这四类中的一类类似于人类的策略，即基于幂律的Yule-Simon过程的策略。
英文摘要：
Human beings tend to cooperate with close friends, therefore they have to construct strong social relationships to recieve cooperation from others. Therefore they should have acquired their strategies of social relationship construction through an evolutionary process. The behavior of social relationship construction is know as "social grooming." In this paper, we show that there are four classes including a human-like strategy in evolutionary dynamics of social grooming strategies based on an evolutionary game simulation. Social relationship strengths (as measured by frequency of social grooming) often show a much skewed distribution (a power law distribution). It may be due to time costs constraints on social grooming, because the costs are too large to ignore for having many strong social relationships. Evolution of humans' strategies of construction of social relationships may explain the origin of human intelligence based on a social brain hypothesis. We constructed an individual-based model to explore the evolutionary dynamics of social grooming strategies. The model is based on behavior to win over others by strengthening social relationships with cooperators. The results of evolutionary simulations show the four classes of evolutionary dynamics. The results depend on total resources and the ratio of each cooperator's resource to the number of cooperators. One of the four classes is similar to a human strategy, i.e. the strategies based on the Yule--Simon process of power law.
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