Helibrain cognitive tests: methods and scoring, version 1.0

Methods and scoring for the free online cognitive tests at helibrain.com (43 tests and games, including reaction time, n-back, Stroop, task switching, trail making, Corsi-type sequence memory, matrix reasoning and a Big Five questionnaire). For each test it documents the task and timing, scoring rules, valid-run criteria, item and stimulus sources, available languages, version history and references to the original paradigms. Tests run free in the browser, with no sign-up, in 100+ languages. This is version 1.0 (November 2026). Scores describe performance on these online versions; validation against established tests is planned and will be published separately. Online methods pages: https://helibrain.com/research