Paper Prototyping

Variation of usability testing where representative users perform realistic tasks by interacting with a paper version of the interface that is manipulated by a person 'playing computer,' who doesn't explain how the interface is intended to work.

Paper Prototyping
A List Apart
Paper Prototyping As A Usability Testing Technique
Usability Geek
Paper Prototyping: The 10-Minute Practical Guide
7 myths about paper prototyping
User Focus
Paper Prototypes: Still Our Favorite
Paper prototyping is a waste of time
Google Ventures