Authors:
Lars Holmquist
In interaction design, it is common to use mock-ups, prototypes and other representations to explore an interactive system before it is actually built. This can range from simple cardboard cutouts to elaborate graphical simulations (see Sidebar 1). This approach has been particularly fruitful in participatory design, where users are brought in very early in the design phase. A representation can be a vehicle for communication, a tangible "placeholder" for the real thing, which represents a proposed artifact's role in a real-world situation. Designers and users can thus explore the user experience of a system together, before it actually exists—even…
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