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However, empirical research findings on this question remain equivocal. Many of the earlier studies centered on empirical human\u2010subject experiments, which inevitably involved many confounding factors. To obtain more theory\u2010driven mechanistic explanations of the linkage between group size and performance, we developed an agent\u2010based simulation model that describes the complex process of collaborative group decision\u2010making on problem\u2010solving tasks. To find better solutions to a problem with given complexity, these agents repeatedly explore and share solution candidates, evaluate and respond to the solutions proposed by others, and update their understanding of the problem by conducting individual local search and incorporating others\u2019 proposals. Our results showed that under a condition of ineffective information sharing, group size was negatively related to group performance at the beginning of discussion across each level of problem complexity (i.e., low, medium, and high). However, in the long run, larger groups outperformed smaller groups for the problem with medium complexity and equally well for the problem with low complexity because larger groups developed higher solution diversity. For the problem with high complexity, the higher solution diversity led to more disagreements which in turn hindered larger groups\u2019 collaborative problem\u2010solving ability. Our results also suggested that, in small collaborative team settings, effective information sharing can significantly improve group performance for groups of any size, especially for larger groups. This model provides a unified, mechanistic explanation of the conflicting observations reported in the existing empirical literature.<\/jats:p>","DOI":"10.1155\/2022\/8265296","type":"journal-article","created":{"date-parts":[[2022,10,12]],"date-time":"2022-10-12T22:20:07Z","timestamp":1665613207000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Group Size and Group Performance in Small Collaborative Team Settings: An Agent\u2010Based Simulation Model of Collaborative Decision\u2010Making Dynamics"],"prefix":"10.1155","volume":"2022","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7014-0728","authenticated-orcid":false,"given":"Shun","family":"Cao","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Neil 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