Abstract Paternal care in humans is facultative, with investment decisions responsive to socioecological context. In particular, paternity confidence is thought to have a significant impact on men's provisioning. However, various aspects of the relationship a man has with his partner can also influence the way he provides for his children. Previous papers have tended to focus either on these kinds of relationship dynamics or on the impact of paternity confidence. However, these categories are often intertwined and parsing their contributions can be conceptually and methodologically difficult. To better understand how paternity confidence and relationship dynamics impact men's investment decisions, we used a series of pictorial vignettes to assess the resource allocation strategies of Himba men. We focus on three traits: mate fidelity, partner type (marital or non-marital), and relationship status (current or former). Results suggest that men prioritize mate fidelity and current reproductive partners in investment decisions, but social obligations to past and current partners and the presence of other male investors also influence decisions. Himba men appear to be balancing social norms related to marriage and fatherhood with individually-driven incentives to invest in current and more faithful partners.

中文翻译：

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亲子关系信心和社会义务解释了男性在实验性捐赠游戏中对浪漫伴侣的分配

摘要 人类的父亲照顾是兼性的，投资决策响应社会生态环境。特别是，亲子关系的信心被认为对男性的供应有重大影响。然而，男人与伴侣关系的各个方面也会影响他养育孩子的方式。以前的论文倾向于关注这些关系动态或亲子关系的影响。然而，这些类别通常相互交织，解析它们的贡献在概念和方法上可能很困难。为了更好地了解亲子关系的信心和关系动态如何影响男性的投资决策，我们使用了一系列插图来评估辛巴族男性的资源分配策略。我们专注于三个特征：伴侣忠诚度，伴侣类型（婚姻或非婚姻），以及关系状态（当前或以前）。结果表明，男性在投资决策中优先考虑配偶忠诚度和当前的生殖伴侣，但对过去和现在的伴侣的社会义务以及其他男性投资者的存在也会影响决策。辛巴男人似乎正在平衡与婚姻和父亲身份有关的社会规范与个人驱动的激励，以投资于现有的和更忠实的伴侣。