Similar to A/B tests, this is testing different labels for same tree category. It is important to only sure one alternative of the tree category per session to user 

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Making comparisons with Tree Testing

Whitenton, Kathryn. “Tree Testing:  Fast, Iterative Evaluation of Menu Labels and Categories.” Nielsen Norman Group, 7 May 2017, https://www.nngroup.com/articles/tree-testing/.

Tree Testing:  Fast, Iterative Evaluation of Menu Labels and Categories

Tree Testing: Comparing Labels

Researchers can test different locations of a label. One can test a single tree and compare the number of people who clicked on which main category to find desired subcategory. 

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