Impact of memory on opinion dynamics
Impact of memory on opinion dynamics
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DOI：
10.1016/j.physa.2018.03.077
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发表时间：
2018-09-01
影响因子：
3.3
通讯作者：
Sznajd-Weron, Katarzyna
中科院分区：
文献类型：
--
作者：
Jedrzejewski, Arkadiusz;Sznajd-Weron, Katarzyna
我们研究了一个基于代理的意见动态模型，其中包含两种类型的社会反应：一致性和独立性。一致性被引入到模型中，类似于Sznajd模型或q-选民模型，这意味着只有一致的群体才会对个体施加同伴压力。新颖之处，相对于以前版本的q-选民模型，是记忆所拥有的每个代理和外部噪声T，它起着社会温度的作用。每一个行动者都有自己的过去经验的记忆，这些经验与独立或顺从的社会成本和收益有关。如果一个代理人在过去因为独立而获得更多的奖励，那么它将比顺从者更倾向于独立，反之亦然。我们将证明，根据社会温度T的系统自发地组织成两个政权之一。在一定的临界社会温度T-C之下，社会中的所有主体都获得个人特质（所谓的个人状态）。他们中的一些人成为永久的顺从者，另一些人开始永远独立行事。这意味着最初同质的群体变得异质，代理人对社会影响的反应也不同。对于T > T-C，所有具有相等概率的代理独立行为或遵守同伴压力（所谓的情境状态）。这种人与情境状态之间的制度变化，让人想起了退火与淬火的混乱，也影响了公众舆论。特别有趣的结果是个人主义的社会，其中公众舆论是T的非单调函数，这意味着有一个最佳的社会温度，在社会中的协议是最高的。(C)2018 Elsevier B. V.版权所有。
We investigate an agent-based model of opinion dynamics with two types of social response: conformity and independence. Conformity is introduced to the model analogously as in the Sznajd model or q-voter model, which means that only unanimous group exerts peer pressure on individuals. The novelty, in relation to previous versions of the q-voter model, is memory possessed by each agent and external noise T, which plays the role of social temperature. Each agent has its own memories of past experiences related to the social costs and benefits of being independent or conformist. If an agent was awarded in past more for being independent, it will have a greater tendency to be independent than conformist and vice versa. We will show that depending on the social temperature T the system spontaneously organizes into one of two regimes. Below a certain critical social temperature T-C, all agents in the society acquire personal traits (so called person state). Some of them become permanent conformists and others start to behave forever independently. This means that initially homogeneous population becomes heterogeneous, and agents respond differently to social influence. For T > T-C, all agents with equal probabilities behave independently or conform to peer pressure (so called situation state). This regime change between person and situation state, which reminds the idea of an annealed vs. quenched disorder, affects also public opinion. Particularly interesting results are obtained for individualistic societies, in which public opinion is non-monotonic function of T, which means that there is an optimal social temperature for which an agreement in the society is the highest. (C) 2018 Elsevier B.V. All rights reserved.