In a project I am involved with, I am presented with a situation regarding Paper Prototyping.
We are currently overhauling the UI for our products and plan to evaluate the UI concept designs with Paper Prototyping very soon.
The original plan was to develop all the screens with graphical visualisations. However our Graphics designer said that they are unable to draw all of the screens on time for the test. It has been suggested that we replace all the un-drawn screens with wireframes for the test sessions.
So what happens now is that within the same test session, the User will be tested with half the use cases (functions) of the system with full visualisation screens, and the remaining use cases with wireframes only. Eg, for an e-commerce site, testing the Search and Browse with visuals, and then test the Checkout with wireframes all within the same test session.
I am aware of the pros and cons with testing of hi-fidelity and lo-fidelity of Paper Prototypes, however I am concern with using both, one after the other, within the same test session as it may introduce variables into the final results.
So I have recommended that the User is only exposed to one of the 2 types of Paper Prototypes developed. However there has been some disagreement with this suggestion as some of my colleagues think that there are no problems at all with testing both types of Paper Prototypes in the same session. Needless to say, we are having trouble reaching a decision.
Therefore I really appreciate it if someone can give us a second opinion on this.
Or if any one who have encountered a similar scenario, please do share you experiences with us.
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