Why Are There Descriptive Norms? Because We Looked for Them

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Penn Social Norms Group (PennSoNG)
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Descriptive norms
Norm emergence
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Social epistemology
Agent-based modeling
Comparative Philosophy
History of Philosophy
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Muldoon, Ryan
Lisciandra, Chiara
Hartmann, Stephan
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In this work, we present a mathematical model for the emergence of descriptive norms, where the individual decision problem is formalized with the standard Bayesian belief revision machinery. Previous work on the emergence of descriptive norms has relied on heuristic modeling. In this paper we show that with a Bayesian model we can provide a more general picture of the emergence of norms, which helps to motivate the assumptions made in heuristic models. In our model, the priors formalize the belief that a certain behavior is a regularity. The evidence is provided by other group members’ behavior and the likelihood by their reliability. We implement the model in a series of computer simulations and examine the group-level outcomes. We claim that domain-general belief revision helps explain why we look for regularities in social life in the first place. We argue that it is the disposition to look for regularities and react to them that generates descriptive norms. In our search for rules, we create them.

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2014-07-31
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Synthese
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