5.1.2 Focus on the guerilla testing

Key learnings:

Guerilla is a quick and straightforward way to test your design elements. It could be done in the street, in a bar, in a café… In return for a free coffee, one person will share their feedback on your design.
It’s cheap and fast to organize.
Nielsen first introduced it in 1994 to overcome the costly existing user testing session.
But there are some limitations as well:
- A too-small number of participants will create bias
- A non-representative set of participants will also create bias.
No more than 5 participants are enough to detect 85% of your problem.