How many participants do you need for unmoderated usability testing?

Since we're using unmoderated for evaluation studies, the sample size should be between 5-8 participants per study.

1. How many participants are needed for usability testing?
2. Does unmoderated usability testing require a person to facilitate?
3. How long should an unmoderated test be?

How many participants are needed for usability testing?

In summary, research suggests that from three to twenty participants can provide valid results, and a good baseline is between five and ten participants. In general, there should be more participants for more complex, highly critical projects; while fewer participants are necessary when testing more novel designs.

Does unmoderated usability testing require a person to facilitate?

Unlike moderated usability testing, unmoderated usability testing is completed by test participants in their own environment without a facilitator present.

How long should an unmoderated test be?

Unmoderated tests should take about 15-20 minutes to complete. Depending on your subscription plan, you can run 30-40 minute unmoderated tests by allowing contributors to opt-in with a screener question.