This article critically interrogates how participation is practiced during the design process. We present the findings of three different configurations of participatory design workshops, each involving a different stakeholder group (age researchers, care experts and older adults). Building on insights from Science and Technology Studies (STS), we reveal how, in design practice, different configurations of participation enact and materialize multiple versions of ageing. To refer to this ontological layer of design processes, we introduce the concept “design multiple”. Our study adds to current debates on the practices of participatory design and STS, as it shows how different configurations multiply enact objects into several material realities. We raise awareness on the practices of configuring participatory design, and their ontological consequences

本文批判性地询问了在设计过程中如何实践参与。我们介绍了参与式设计研讨会的三种不同配置的结果，每个研讨会都涉及不同的利益相关者群体（年龄研究人员，护理专家和老年人）。基于科学技术研究（STS）的见解，我们揭示了在设计实践中，不同的参与配置如何制定并实现多种形式的老龄化。为了引用设计过程的这一本体层，我们引入了“设计多重性”概念。我们的研究增加了有关参与式设计和STS实践的当前辩论，因为它表明了不同的配置如何将制定的对象繁殖成几种物质现实。我们提高了对参与式设计配置实践的认识，