
Tree Test
This is also called reverse card sorting. This is a method where the participants try to find elements in a given structure. The objective of this method is to discover findability problems and improve the organization and labeling system.
The organization structure used should represent a realistic navigation for the application or web page you are evaluating. If you don't have one by the time the experiment is taking place, try to create a real scenario, as using a fake organization will not lead to really valuable results.
There are some platforms available to perform this type of experiment with a computer. One example is https://www.optimalworkshop.com.
This can have several advantages: the experiment can be carried out without requiring a physical displacement by the participant, and you can also study the participant's steps and not just analyze whether the participant succeeded or not. It can be that the participants found the objectives but had to make many attempts to achieve them.