Mind
Cognitive Biases
A cognitive bias is a systematic error in judgment: a mental shortcut that usually saves time, applied somewhere it steers you wrong. Everyone runs on them, at every intelligence level, and knowing about them doesn't switch them off. What makes them worth studying is that the errors are predictable. A random mistake can't be planned around. A predictable one can.
What is a cognitive bias?
A cognitive bias is a repeatable pattern in how judgment deviates from what the evidence supports. The research program behind the term came from psychologists Amos Tversky and Daniel Kahneman in the 1970s, who showed that people estimating odds and values don't compute. They substitute quicker questions, like how easily an example comes to mind. The substitutions work most of the time, which is exactly why the misses are so hard to notice from the inside.
Why does your brain use shortcuts at all?
Speed. You make hundreds of judgment calls a day: what to trust, what to buy, what to ignore. Computing each one from scratch would cost more time and attention than any person has. Shortcuts answer instantly and are right often enough to keep. The price is a set of built-in blind spots that show up on schedule, in the same places, for nearly everyone. That's not a personal flaw. It's the standard equipment.
Biases and the science of your mind
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The 10,000-Hour Rule Failed Its Own Data
The 10,000-hour rule came from a study of 30 violinists, and the researcher behind it spent years saying it was misread. Here's what the data shows.
Dopamine Detox: Its Inventor Says It's Not About Dopamine
The dopamine detox trend misreads the science: dopamine doesn't deplete or flush out. Here's what its creator actually built, and what works instead.
Loss Aversion: Why Losing $50 Hurts More Than Winning It
Loss aversion, Kahneman and Tversky's finding that losses loom larger than gains, explains sales tactics, sunk costs, and why saving feels like losing.
The Diderot Effect: Why One Purchase Triggers the Next
In 1769, a philosopher got a beautiful dressing gown as a gift and ended up in debt. The Diderot effect explains why one upgrade triggers the next.