In the Sept-Oct issue of interactions, Creative Director for the Windows Core Innovation Team August de los Reyes and I describe an approach to designing emotionally engaging products. The approach is based on the James-Lange theory - a pioneering theory of emotion that places physical activity as the source of emotions, rather than a product of emotion. In this approach emotions are a “readout” based on our activity and the context in which it occurs. This has clear implications for what user researchers focus on during the design of products, and speaks towards the relationship between how researchers and designers work together in creating compelling products …