Sunburst charts JSON files

The three JSON files contain the hierarchical input data used to render the object-centric sunburst charts in the three study conditions of the eye-tracking user study. Each file is a tree in the standard D3.js hierarchy format: every node has a name, inner nodes carry a children array, and leaf nodes carry a numeric value that determines the angular size of the corresponding sunburst segment. The data are derived from the well-known Flare class-hierarchy dataset (the package structure of the Flare ActionScript visualization library), a common benchmark for hierarchical visualization research. All three files describe a structurally identical hierarchy. They contain 253 nodes in total, 200 of which are leaves, with a maximum depth of four levels below the root node. Study_2.json differs only in that the top-level branch vis is renamed to math that the search targets across conditions are not trivially transferable while chart complexity, structure, and segment sizes remain constant.