arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.3949physics.soc-phcs.SI
收藏

贝叶斯更新和确认偏差下的集体意见形成模型

A collective opinion formation model under Bayesian updating and confirmation bias

Ryosuke Nishi, Naoki Masuda

摘要:

我们提出了一个集体意见形成模型与所谓的确认偏见。确认偏误是一种心理效应,在意见形成的背景下,赞成某个意见的个人容易将新的信息误解为支持个人当前的信念。我们的模型修改了单个个体的贝叶斯决策模型[M.拉宾和J. L. Schrag,Q. J. Econ. 114,37(1999)]的情况下,相互作用的个体的良好混合的人口在没有外部输入。我们数值模拟的模型表明,所有的代理人最终同意的两个意见之一,只有当确认偏差是弱的。否则,随机种群动力学最终会产生不一致的配置(也称为极化),特别是对于大系统尺寸。强烈的确认偏差允许不同部分的个体最终形成不同的不同意配置,以支持相反的意见。

英文摘要:

We propose a collective opinion formation model with a so-called confirmation bias. The confirmation bias is a psychological effect with which, in the context of opinion formation, an individual in favor of an opinion is prone to misperceive new incoming information as supporting the current belief of the individual. Our model modifies a Bayesian decision-making model for single individuals [M. Rabin and J. L. Schrag, Q. J. Econ. 114, 37 (1999)] for the case of a well-mixed population of interacting individuals in the absence of the external input. We numerically simulate the model to show that all the agents eventually agree on one of the two opinions only when the confirmation bias is weak. Otherwise, the stochastic population dynamics ends up creating a disagreement configuration (also called polarization), particularly for large system sizes. A strong confirmation bias allows various final disagreement configurations with different fractions of the individuals in favor of the opposite opinions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑