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. 2019 Jun 26;14(6):e0218729. doi: 10.1371/journal.pone.0218729

Fig 1. The Basic Voter Model (BVM) versus the Concealed Voter Model (CVM).

Fig 1

(A) In the BVM, every individual is represented by a node in a single layer, which is “external” in the sense that all of its neighbors can see and copy his opinion. The tension that is caused by the disagreement between neighbors (for example between the blue individual 1 and the red individual 2) can be released by adopting the neighbor’s opinion. Such copies happen with a rate c. (B) In the CVM, every individual is represented by two nodes: one in the external and another in the internal layer. For example, let us consider individual 1, outlined by the green rectangle. His external/internal opinion is marked by a blue/red circle. Because these opinions differ, we call individual 1 a “hypocrite”. The tension between the external versus internal opinion can be released either by externalization or internalization (with the corresponding rates e and i). None of the individuals knows the internal opinion of any other individual. Hence, there are no edges within the internal layer.