Learn about cognitive biases

There is a long list of cognitive biases and learning all of them accomplishes very little, because knowing a bias exists does not reliably stop you exhibiting it. The useful hour covers a handful that appear constantly in everyday decisions, and the structural tricks that reduce them without relying on catching yourself in the act.

Why learn about cognitive biases is worth an hour

Biases operate below deliberate thought, which is why awareness alone is a weak intervention. Structural approaches work better because they change the process rather than the person: writing a prediction before seeing the result, asking what would change your mind, or having someone argue the opposite. Each removes the opportunity rather than requiring vigilance.

How to learn about cognitive biases step by step

1. 1

   Learn four, not forty

   Confirmation bias, sunk cost, availability, and hindsight. These four cover an enormous share of everyday errors.

2. 2

   Find each one in your own past

   A real decision where you did this. Personal examples make a bias recognizable in a way definitions never do.

3. 3

   Write predictions before outcomes

   Record what you expect before you find out. It is the only defense against hindsight rewriting your memory.

4. 4

   Ask what would change your mind

   Before researching anything, name the evidence that would move you. This directly counters confirmation bias.

5. 5

   Separate sunk costs from future value

   Ask what you would decide starting fresh today. Money already spent is not a reason to spend more.

Tips to get more out of it

• Assume you are biased rather than assuming you have corrected for it. Believing yourself objective is itself a known bias.
• Ask someone to argue against your position genuinely. External challenge outperforms internal vigilance considerably.
• Watch for biases in your favor especially. Those are the ones you have no motivation to catch.

Ways to mix it up

If you make decisions with data, focus the hour on base rates and survivorship bias, which cause the most expensive errors in that context. If you invest or gamble in any form, loss aversion and the gambler's fallacy are the two worth knowing in detail.

Learn about cognitive biases: frequently asked questions