Oberhofer, Viviana MSeeber, IsabellaWaizenegger, Lena2026-05-152026-05-152026-04-30Group Decision and Negotiation, ISSN: 0926-2644 (Print); 1572-9907 (Online), Springer Science and Business Media LLC, 35(2), 33-. doi: 10.1007/s10726-026-09990-z0926-26441572-9907http://hdl.handle.net/10292/21087Social robots are becoming more autonomous and they are likely to soon join organizational teams as active team members. As such, their personality design—specifically, their extroversion-introversion personality—matters, as it shapes individuals’ affective reactions. Yet it remains unclear through which underlying cognitive processes robot personality influences task satisfaction in team contexts. Past research efforts to understand these processes resulted in dispersed and conflicting theories. This study proposes a parsimonious conceptual model integrating theories on anthropomorphism and the theory of mind: the mental model attribution process (MMAP). Based on a between-subject animated video vignette study with 401 crowd workers, the MMAP explains how robot extroversion-introversion cues affect task satisfaction. The results show that extroverted social robots elicit higher task satisfaction than introverted robots. This effect is explained by increased anthropomorphism, leading to more agency and experience inference, and higher ascribed robot empathy. By integrating research on anthropomorphism, theory of mind, and robot personality design, this study contributes a parsimonious, empirically testable conceptual model for understanding affective reactions to social robots in a team context.Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.http://creativecommons.org/licenses/by/4.0/46 Information and Computing Sciences4608 Human-Centred ComputingBehavioral and Social ScienceMental Health3 Good Health and Well Being1503 Business and ManagementInformation Systems3503 Business systems in context3801 Applied economics4609 Information systemsAnthropomorphismEmpathyHuman-agent teamMental model attribution processExtroversionSatisfactionJournal ArticleOpenAccess10.1007/s10726-026-09990-z