All Cognitive Biases in 66 Languages
Free course and library on 190+ cognitive biases to improve decision-making.
Free - Free forever. No card required.
About All Cognitive Biases in 66 Languages
A free, research-backed library and course that helps people spot systematic errors in thinking. Explore 190+ cognitive biases explained in plain language, available in 66 languages. Each entry cites primary sources (1,800+ academic references) and the site includes a free course to practice catching biased thinking. A social-impact project — free forever, no card required. Content reviewed and regularly updated (last reviewed August 2026).
Key Features
- 190+ bias entries explained in plain language
- Free interactive course to practice spotting biases
- Available in 66 languages
- Each article lists primary sources (1,800+ academic references)
- Reviewed content and social-impact mission
Who is this for?
Anyone who wants to improve decision-making—students, professionals, educators, and the general public.
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