Hallway testing

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Hallway testing (or hallway usability testing) is a specific methodology of software usability testing. Rather than using an in-house, trained group of testers, just five to six random people, indicative of a cross-section of end users, are brought in to test the software (be it an application, web site, etc.); the name of the technique refers to the fact that the testers should be random people who pass by in the hallway. The theory, as adopted from Jakob Nielsen's research, is that 95% of usability problems can be discovered using this technique.