Editing Usability testing (section)

===Hallway testing===

'''Hallway testing''', also known as '''guerrilla usability''', is a quick and cheap method of usability testing in which people — such as those passing by in the hallway—are asked to try using the product or service. This can help designers identify "brick walls", problems so serious that users simply cannot advance, in the early stages of a new design. Anyone but project designers and engineers can be used (they tend to act as "expert reviewers" because they are too close to the project).

This type of testing is an example of [[convenience sampling]] and thus the results are potentially biased.