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Start for freeIn user research, a baseline is the initial set of data or measurements collected before any changes or interventions are made. It serves as a reference point to compare future results and understand the impact of design changes or improvements.
Synonyms: starting point, initial data, reference point, baseline measurement

A baseline provides a clear starting point that helps researchers and designers measure progress and effectiveness. Without a baseline, it is difficult to know if changes have improved the user experience or not.
Researchers collect baseline data through methods like surveys, usability tests, or analytics before implementing new features or design updates. This data is then compared with post-change data to evaluate success.