For researchers
Helibrain offers free browser and phone versions of classic cognitive tasks, such as reaction time, memory span, the Stroop task and the balloon risk task. They run in 100 languages. Each task has a methods page that describes exactly how it works: the trials, the timing, the scoring and the rules for a valid run. Each task also has a ready citation, so you can say precisely which version you used.
Tasks
Every task below links to its methods page, with its version number and references.
- Aim trainerv1 →
- Aphantasia testv1 →
- Attention span testv1 →
- Balloon risk gamev1 →
- Big Five personality testv1 →
- Brain-health habits checkv1 →
- Chimp testv1 →
- Click speed testv1 →
- Color perception testv1 →
- Creativity testv1 →
- Daily logic puzzlev1 →
- Decision trapsv1 →
- Draw a perfect circlev1 →
- Emotion recognition testv1 →
- Face memory testv1 →
- Four-deck card gamev1 →
- Daily general knowledge quizv1 →
- Go/no-go testv1 →
- Guess 2/3 of the averagev1 →
- IQ testv1 →
- Matrix reasoning testv1 →
- Math speed testv1 →
- Mental rotation testv1 →
- N-back testvnback-training-1 →
- Number memory testv1 →
- Reaction time testv1 →
- Reading speed testv1 →
- Three-word riddlesv1 →
- Sense of direction testv1 →
- Sequence memory testv1 →
- Social shapes challengev1 →
- Stress resilience profilev1 →
- Stroop testv1 →
- Processing speed testv1 →
- Task switching testv1 →
- Time perception testv1 →
- Tone deaf testv1 →
- Tower of London testv1 →
- Trail making testv1 →
- Typing speed testv1 →
- Verbal memory testv1 →
- Visual memory testv1 →
- Vocabulary testven-adaptive-1 →
How to cite
Cite the task and the version you used, with the link to its methods page:
Helibrain (2026). <Task name>, v<version>. helibrain.com/<slug>/methods
For example: Helibrain (2026). Attention Span Test, v1. helibrain.com/attention-span-test/methods
The version changes whenever the scoring changes. Results from different versions should not be pooled. Please also cite the original paper of the task, which is listed on its methods page.
Run a study
Coming soon. You will be able to create a study link for any task yourself:
- Consent stays with you. Your own survey or study platform handles information and consent, and then sends participants to the study link.
- A clean study mode. Participants play the task without sharing buttons, comparisons or links to other pages.
- Trial-level data. You can export every trial of every run, not only the final scores.
- Separate data. Study data is stored apart from the public site and is not used for Helibrain's own purposes. It is deleted on your request, and when you delete the study.
Study links will be covered by our Research Terms.
Norms
We will publish aggregate norms for each task, by language and age band, as open datasets with a DOI. A group is published only once it has enough players to give stable numbers. Each dataset will state the task version, the sample and how runs were filtered.
How tasks and texts are made
- Tasks. Each task is built from its published description. All numbers (trials, timings, thresholds, scoring) live in one place on our server, and the methods page shows them as they are used.
- Translations. Instructions and item texts are translated using machine-assisted translation with automated script and spelling checks and comparison with native text corpora.
- Language-specific material. Tasks that depend on words, such as word lists or reading passages, are offered in a language only when material made for that language exists. We do not simply translate English word lists.
- Review status. Each methods page shows, per language, whether the texts have been reviewed by a native speaker or checked only automatically.
Contact
Questions, corrections or ideas for a task: hello@helibrain.com