Interview frequency: …
Short answer
It measures information findability through a plain text tree structure without visual or graphic interface elements.
Explanation
By removing colors, buttons, and design distractions, Tree Testing focuses only on menu structure and labels (taxonomy). Users are asked, "Where would you find a bill payment document?" and navigate only through nested categories. If users fail to find it, the problem is information organization and IA, not button or color design.
Common mistakes
- Running Tree Testing on fully colored interfaces, mixing usability with findability.
- Writing the test scenario with the same words as the destination link, invalidating the test.