Guerilla Usability Testing
How low-cost, low-effort user testing can improve
What is Guerilla Usability Testing?
Guerrilla testing is a
fast and low-cost way
to gain sufficient
insights to make
What is Guerilla Testing Good for?
Identifying clear usability issues
Testing assumptions with real users
Getting quick feedback when in doubt
Best for short tasks needing
no prior knowledge or
Whar is Guerrila Testing Not Good for?
Komplex UIs or tasks
Extrapolating distribution of attitudes to the
target audience as a whole
(e.g. “60% of users prefer that variant”)
Who can Do it?
Anyone who is at least somewhat
– Outgoing and friendly
Who to Test With?
Anyone matching the target audience
Current users of the tested software if
experience is needed
– People met at a pub or café
– Coworkers, fellow students, etc.
– Friends and family (be sure not to always test the
What do we Need?
A UI/UX design (anything from rough
sketches on paper to a coded UI)
A place with people matching the target
Some money for incentives (e.g. a beer per
tester) if testing with strangers
What to do? (1)
Define your research question
Define test tasks and/or questions
Bring device or piece of paper with UI on it
Ask people if they’d like to try it out for a few
minutes (in exchange for e.g. a beer)
Introduce what the UI is about (only as much
as absolutely necessary)
What to do? (2)
Explain test procedure, ask to think aloud
If testing a full application
– Give a few minutes to familiarize with the
Describe the task
Watch users perform the task
– Take notes
– If possible, record voice, screen + interactions
Let’s Get Testing!
When in doubt, do a guerilla test!
Split the work among the team (e.g. five
members do one test each)
If you have questions, talk to me or send me
an email ( firstname.lastname@example.org )
Sources / further reading
 adapted from https://uxmag.com/articles/getting-guerrilla-with-it
All images CC0 from https://pixabay.com/