Tree Testing
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.
How It Works
- Present users with a text-only version of your site's structure (the "tree")
- Give them a task (e.g., "Find information on shipping costs")
- Observe whether they can successfully navigate the tree to find the correct location
- Measure success rate and identify where users go wrong
Why Text-Only?
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.
Key Metrics
| 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 |
When to Use It
Tree testing is particularly valuable:
- Before designing screens for a new product
- When restructuring an existing navigation
- To validate card sorting results
- When comparing alternative structures
Related Terms
Information Architecture
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.
Card Sorting
A research method where participants organize topics into groups that make sense to them, revealing their mental models and informing information architecture decisions.
Usability
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.
Mentions in the Knowledge Hub
This term is referenced in the following articles:
Research Method Explorer
An interactive tool that guides you to the right UX research method based on your goals, constraints, and context.
Information Architecture Research: Card Sorting and Tree Testing
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.