Chapter 11 talks about using low/high fidelity prototypes when designing something. On page 561, the text talks about card-based prototypes (it looks like they are mostly used for website designs in the examples given). Can you classify a card-based design as high fidelity or low fidelity? Keep in mind that these cards usually give the user (tester) the assumption that there is a common WIMP/GUI to use in the final product. Could this be an inaccurate way to test a design if the user assumes that it will be a GUI-based design in the final product? Would using a tool (like DENIM, page 572) be more effective?