How to determine the right number of participants for usability studies

Have we left N=5?

“UX researchers and other project stakeholders often fervently debate the number of participants that are necessary for usability studies. At the core of this debate is often the tension between the usability professional’s desire for the best possible study and the business team’s desire to reduce time and expense.”

Janet M. Six a.k.a. /janetmsix | @JanetMSix and Ritch Macefield a.k.a. /dr-ritch-macefield | @Ax_Stream ~ UXmatters ★

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