I’ve shared lists of cognitive biases before, and books and blog posts on the topic are everywhere. To me, this stuff is like catnip.
While doing further research into cognitive-debiasing training (inspired by Philip Tetlock’s research on forecasting), I stumbled across an extensive index of over 100 cognitive biases from The Decision Lab.
The biases are neatly organised into four categoriesāambiguity, memory, speed, and information overload. Each entry in the index begins with a straightforward question that sets the stage, followed by a detailed exploration of its effects (individual and systemic), the psychological reasons behind it, and practical ways to counteract it.

Structured across four categories (ambiguity, memory, speed, and information overload), each bias starts with a simple explanatory question, before delving into it’s individual and systemic effects, a description of why the bias happens, and how it can be avoided.
It’s probably the best-crafted overview I’ve found on the topic, and a valuable resource for anyone interested in decision-making.