An evaluative method for validating information architecture by presenting users with a text-only version of a site structure and measuring whether they can navigate to the correct location for given tasks.
Definition: An evaluative method for validating information architecture by presenting users with a text-only version of a site structure and measuring whether they can navigate to the correct location for given tasks.
Tree testing is the evaluative counterpart to card sorting. It validates whether a proposed information architecture is intuitive before any visual design work begins.
By removing visual design elements—colors, images, icons—tree testing isolates the structure itself. This reveals whether problems are caused by the organization of content rather than visual presentation.
| Metric | What It Measures |
|---|---|
| Success rate | Percentage of users finding the correct location |
| Directness | Whether users went straight to the answer or backtracked |
| Time to complete | How long users took to navigate |
| First click | Where users started their journey |
Tree testing is particularly valuable:
The structural design of information environments—how content is organized, labeled, and connected to help users find what they need and understand where they are.
A research method where participants organize topics into groups that make sense to them, revealing their mental models and informing information architecture decisions.
Per ISO 9241-11: the extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency, and satisfaction in a specified context of use.
This term is referenced in the following articles:
An interactive tool that guides you to the right research method based on your goals, constraints, and context.
Before you design a single screen, the structure of your content must make sense to users. Card sorting and tree testing are specialized techniques for designing and validating information architecture.