Summers, AlanMcGuirk, Tom2021-01-142021-01-142023-04-03McGuirk, T. & Summers, A. (2023). Across the threshold: A somaesthetic approach to the design of extended realities. In R. Shusterman, B. Veres, (Eds.), Somaesthetics and Design Culture (pp. 183-212). Brill.9789004536647http://hdl.handle.net/10034/624173The prospect that extended realities (XR) will become a seamless part of our everyday environment comes ever closer with the development of mixed reality headsets. These devices allow a blending of digital objects with the user’s actual spatial environment. The user interacts with the virtual objects and these objects can, in turn, interact with the ‘real-world’ environment. We argue that the design and interpretation of these extended realities requires design thinking that questions the dominant standard model of cognition, which is indebted to Cartesian perspectivism. We suggest that situated and enactive models of cognition furnish a better understanding of how the body, mind and environment are essentially integrated, enabling us to apply such understanding advantageously to the design of these devices and environments.Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Extended RealityMixed RealityAugmented RealityDesignSomaestheticsSituated CognitionEnactive CognitionVirtual RealityBook chapter