**Author(s):** Abe, S; Tsuchida, S; Takezawa, M <br><br>Cultural group selection (CGS) has been regarded as the most plausible theory which explains the evolutionary process of group beneficial norms. The key mechanisms of CGS are called intergroup conflict, which takes multiple forms and propagates the group's beneficial cultural traits in a population. Abe et al. (2021) experimentally investigated whether payoff-biased imitation, a form of intergroup conflict, diffuses the group beneficial traits across groups playing an n-person stag-hunt game. They showed the frequency of group beneficial traits increased faster when payoff-biased imitation across groups was feasible. In this study, we analyzed the participants’ decision processes by fitting and comparing five individual/social learning models employed by McElreath et al. (2008). Both the model simulations and model comparison analyses showed that participants’ choices were best explained by the hierarchical model of payoff-biased social learning and frequency-dependent social learning. Our results suggest that cultural group selection processes are driven without lethal intergroup conflicts with the help of payoff-biased imitation, which supports the result of Boyd & Richerson (2002)’s model.

Cultural evolution of group beneficial norms: The analysis of social learning strategies by computational modeling

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Cultural evolutionary theory: Innovations, syntheses, and (hi)stories 2

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### Welcome to the fourth Cultural Evolution Society Conference, CES2022! 

As last year, Underline will support the online component of the conference. The ongoing COVID-19 pandemic is causing a great deal of uncertainty for all of us. Therefore, we seek to offer a hybrid format that will hopefully allow some folks to travel to Aarhus, others to meet up locally or regionally in CES hub-lets, and other yet to participate online. The field of cultural evolution is growing in size and scope; its theories, methods and applications - both academic and applied - are getting ever more robust. Do join us in what promises to be an exciting exchange of ideas and a celebration of our field.

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#### The CES 2022 local organising committee
* Luseadra Joy McKerracher
* Jesper Sørensen 
* Niels Nørkjær Johannsen 
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* Felix Riede
* Iza Romanowska 
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Cultural Evolution Society 2022

The field of cultural evolution is growing in size and scope; its theories, methods and applications - both academic and applied - are getting ever more robust. Do join us in what promises to be an exciting exchange of ideas and a celebration of our field.

Saaya Abe

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Cultural evolution of group beneficial norms: The analysis of social learning strategies by computational modeling

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