Electronics are ubiquitous and are found in a variety of products, including consumer electronics, medical systems, toys, and even softgoods (textile products). Products therefore increasingly incorporate a growing list of interactive technologies, including: screen-based interfaces, keypads, wireless elements, and sensors.

In the previous chapter it was shown how interactive elements could be tested initially with simple low-fidelity prototypes by investigating scenarios. Screen-based interfaces can, for example, be acted out step by step with a paper prototype. This can then progress into higher-fidelity prototypes on screen using programs such as Powerpoint® or Flash®. Beyond screen-based interfaces, ...

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