WOZ Pro (Wizard of Oz Prototyper) is a pen-based software environment that supports the quick and easy creation and testing of low fidelity user interface prototypes. WOZ Pro is designed to be as easy to use as pen-and-paper, but to hold key advantages over pen-and-paper and existing computer-based tools. When designing interface screens in WOZ Pro, designers can easily (a) propagate a design change to other related screens, and (b) specify the set of screens that are reachable from a given screen. In a wizard of oz test, WOZ Pro reduces the cognitive load on the wizard by allowing navigation only to those next screens that are valid.
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