We consider the process of opinion formation, in a society where there is a set of rules B that indicates whether a social instance is acceptable. Public opinion is formed by the integration of the voters’ attitudes which can be either conservative (mostly in agreement with B) or liberal (mostly in disagreement with B and in agreement with peer voters). These attitudes are represented by stable fixed points in the phase space of the system. In this article we study the properties of a perturbative term, mimicking the effects of a publicity campaign, that pushes the system from the basin of attraction of the liberal fixed point into the basin of the conservative point, when both fixed points are equally likely.

在一个存在一组规则B来指示社会实例是否可以接受的社会中，我们考虑意见形成的过程。舆论是由选民态度的整合形成的，选民的态度既可以是保守的（主要是与B达成一致），也可以是宽松的（主要是与B不一致并与同龄选民一致）。这些姿态由系统相空间中的稳定固定点表示。在本文中，我们模拟了一次宣传运动的影响，研究了摄动词的性质，这种行为将系统从自由定点的吸引盆地推向保守点的盆地，而这两个定点都有可能同时出现。