Just my experience, three people is not a big enough sample size for most projects. You will get very biased opinions if you go with that. That may be ok if you have a very niche project and you only ask some people in that niche.
> You will get very biased opinions [with 3 testers]
Your anecdote is atypical.
https://www.nngroup.com/articles/why-you-only-need-to-test-w...
Re:Will Linux phones stay around this time?
by matkoniecz on Sunday May 02, 2021 @11:46AM
(#27016241)
Or when you have obvious problems!
Take it with pile of salt, I am not some big expert. I just did it with some projects. But it seems to me that in nearly all cases there are glaring issues that would be detected with any amount of testing at all.
It is not so bad.
Take three people who never used given software, ask them to do the most basic tasks. And fix the most common problems.
Your (and mine) software is much harder to use than you expect.
You do not need UI/UX people, massive scale testing to fix low hanging fruit.