There are some good articles on the web about paper prototyping, mentioned in the earlier prototyping lectures, some examples are here and here. I think paper prototyping may be useful for us in terms of testing how people interact with the hardware, but I think the menu system for the input device can be better modelled using something like Powerpoint or HTML, where hyperlinks act similarly to touch screen buttons. A point mentioned in the first article is that paper prototyping is difficult for dynamic menu components (e.g. scroll bars), which could be modelled in HTML.
Another useful way for us to use paper prototyping is for the handwriting input sections, as users could physically write out on paper what they would input.
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