Video tutorials
Narrated walkthroughs of Open Lab and of building tasks in the lab.js builder. Each has subtitles in 12 languages, chapters and a transcript, the files to follow along directly under the player, and a link to its docs page.
Open Lab: from a first study to data
The Study Builder in depth
3:31 · narrated, with subtitles in 12 languages · recorded in October 2026
The study from the previous video gets a second factor: the five kinds of step, when a branch suits better than group codes, a key-mapping branch with the task and its own parameters in each condition, random assignment, saving and the demo.
Up nextlab.js and the builder3:25 →