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In order to solve the problem of opinion polarization and distortion causedby echo chamber effect in the evolution process of online public opinion,athree-dimensional Deffuant-Weisbuch model is proposed to study the formationand elimination of echo chamber effect in this paper. Firstly, the originalpairwise interaction model is generalized to three-point interaction model.Secondly, we consider individual psychological mechanism and introduceindividual emotional factor into the trust threshold of original model.Finally, the natural evolution coefficient of opinion is introduced to modifythe model. The improved model is used to conduct simulation experiments onsocial networks with different structures, and opinion leaders and activeagents are introduced into the network, so as to study the correspondinggeneration and breaking mechanism of echo chamber. The experimental resultsshow that the change of network structure cannot eliminate the echo chambereffect, and the increase of network stability and connectivity can only slowdown the echo chamber effect. Opinion leaders can aggregate opinions withintheir scope of influence and have a guiding effect on opinions. Therefore, ifopinion leaders can change their opinions over time, they can well guideopinions to converge to neutral opinions, thus achieving the purpose ofbreaking the echo chamber. Active agents can lead the opinions in the networkto converge to the neutral, and active agents with high stubbornness can leadthe free views to converge to the neutral, thus achieving the purpose ofbreaking the echo chamber effect.

Echo chamber effects based on a novel three-dimensional Deffuant-Weisbuch model