190+ bias explainers
The site includes more than 190 cognitive bias articles, each written in plain language and linked to the research behind it.
Cognitive Biases Academy
Cognitive Biases Academy is a free learning site that explains 190+ cognitive biases in plain language and offers a 21-day course for guided study. It is available in 66 languages and does not require a paid plan to read the library.
What Cognitive Biases Academy is
Cognitive Biases Academy is a free educational website about judgment, decision-making, and the mental shortcuts that distort them. It offers a library of 190+ cognitive bias explainers, a free 21-day course, and category and alphabet views for browsing the material.
The project is positioned as a social-impact resource rather than a paid software product. According to the site, the content is free to read, available in 66 languages, and written from academic sources in a way that stays readable without a psychology background.
Core features
Category-based browsing
The library is organized into categories that group biases by how they affect thinking, such as too much information, not enough meaning, need to act fast, and memory.
Alphabetical bias list
A separate A–Z directory lets readers search the full list of 190 biases and open individual explainers from one index page.
Structured article format
Each bias article follows a consistent format, with a quick summary, examples, causes, consequences, mitigation strategies, and primary sources.
Multilingual access
The project is available in 66 languages, which lowers the barrier to reading and studying the material across regions.
Guided 21-day course
A free 21-day course walks readers through the full library with one short lesson per day and a small practice at the end of each lesson.
Common ways to use the site
Look up a specific bias
Read a single bias article when you want a plain-language explanation, examples, and sources for a specific reasoning error.
Build a learning routine
Use the 21-day course if you want a day-by-day path through the full library with a short practice after each lesson.
Study by theme
Browse the category pages when you want to compare related biases and understand how they cluster by cognitive function.
Navigate the full library
Use the A–Z list when you already know the name of a bias and need the full explainer quickly.
Pros and Cons
Pros
- The library covers 190+ biases, which gives the site broad topical coverage in one place.
- Articles are written in plain language and cite primary sources at the end of each entry.
- The project is free to read and does not require an account for basic access.
- The 21-day course gives readers a guided path through the library instead of leaving them to browse on their own.
- The site is available in 66 languages, which makes the content more accessible to non-English readers.
Cons
- The site does not show a pricing page with paid plans, so there is no evidence of advanced tiers or enterprise options.
- No integrations, exports, API, or LMS-style features are described in the source pages.
FAQ
Is Cognitive Biases Academy free to use?
No. The About page says there is no paywall and no premium tier, and the site says every article is free to read.
How does the free course work?
The course is structured as one short lesson per day for 21 days, with each day ending in a small practice activity.
Do I need an account to read the content?
The course page says a free account lets you track progress through the 21 days. The site also says you do not need an account to read the bias library.
What languages are supported?
The site presents the library in 66 languages and describes the project as making the material available in the language people actually think in.
Does it integrate with other tools?
The source material does not show integrations, exports, or an API. It appears to be a reading-and-course site rather than a connected software platform.
Quick Facts
- Category
- Education
- Product type
- Free learning website
- Primary users
- Students, teachers, professionals, and general readers
- Pricing
- Free; no paywall or premium tier stated
- Domain
- cognitivebiases.academy
- Language support
- 66 languages
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