Organisations increasingly use websites to promote prosocial behaviour such as volunteering, philanthropy, and activism. However, these websites often fail to encourage prosocial behaviours effectively. To address the lack of relevant research, we develop, then refine, a design model that identifies the user experience factors that create intention to engage in prosocial behaviour on websites. We test an initial model developed from the literature, by interviewing forty participants, each of whom visited and compared six volunteering websites. Our analysis of the participants' user experience reveals eighteen elements that interplay to create intention to engage in prosocial behaviour. Our refined design model comprises ten website features (interaction, factual, anecdata, external recognition, organisational expression, value suggestion, explanatory content, visual media, written media and, website design), seven perceptions (ease of use, aesthetics, information quality, trust, negative affect, positive affect, and argument strength), and one motivation (egoism). These findings provide novel insights into how to design Information and Communications Technology (ICT) to encourage prosocial behaviour.

组织越来越多地使用网站来促进亲社会行为，例如志愿服务，慈善事业和行动主义。但是，这些网站通常无法有效地鼓励亲社会行为。为了解决相关研究的不足，我们开发了一个设计模型，然后对其进行了细化，该模型可以识别用户体验因素，这些因素可以促使人们参与网站上的亲社会行为。我们通过采访40名参与者来测试根据文献开发的初始模型，每个参与者都访问并比较了六个志愿者网站。我们对参与者的用户体验的分析揭示了18个相互影响的要素，以营造参与亲社会行为的意图。我们完善的设计模型包括十个网站功能（互动，事实，信息，外部认可，组织表达，价值建议，解释性内容，视觉媒体，书面媒体和网站设计），七个感知（易于使用，美观，信息质量，信任，负面影响，正面影响和论点强度）和一种动机（利己主义）。这些发现为如何设计信息和通信技术（ICT）以鼓励亲社会行为提供了新颖的见解。