Cognitive bias

A cognitive bias is a systematic pattern in how minds deviate from rational judgment, caused by the brain's tendency to use mental shortcuts called heuristics. Rather than processing every detail, our brains evolved to make fast decisions using rules of thumb—often brilliantly, but sometimes leading us astray.

These biases affect how we gather and interpret information, form memories, and make decisions. Some emerge from genuine efficiency: Confirmation bias helps us act decisively by seeking evidence that supports what we already believe. Others arise from emotional or social needs—In-group bias strengthens community bonds, while Attribution bias helps us construct coherent narratives about why events occur.

Cognitive biases are not flaws to eliminate (impossible, anyway) but features to recognize. Understanding them matters in design, medicine, law, and user experience design, where poor decisions ripple outward. Information visualization and dashboards can be designed to counteract biases; institutions build systems with checks and balances.

The study of cognitive biases intersects Psychology, Economics, and Neuroscience, revealing how universal human limitations shape everything from markets to relationships.

Related

Heuristics, Confirmation bias, In-group bias, Decision-making, Behavioral economics, Psychology