How Many Users Do People Actually Test? – MeasuringU
If you’re familiar with usability testing then you’re familiar with the magic number 5. Five users will on average find most of the problems that affect at least one-third or more of your users. If problems are less common, then you will need to test more users to find and fix them. On many high-traffic websites usability problems affect less than 1 out of 10 users so a larger sample size is neede
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