confirmation bias

American  

[kon-fer-mey-shuhn bahy-uhs] / ˌkɒn fərˈmeɪ ʃən ˌbaɪ əs /

noun

Psychology.

1. bias that results from the tendency to process and analyze information in such a way that it supports one’s preexisting ideas and convictions: Unfortunately, their experimental method was proven invalid due to confirmation bias.

   Confirmation bias is a major issue when we get all our news from social media sites.

   Unfortunately, their experimental method was proven invalid due to confirmation bias.

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Etymology

Origin of confirmation bias

Coined in 1960 by English psychologist Peter Wason

Example Sentences

So I think there was some confirmation bias as well.

From Los Angeles Times • May 20, 2026

But there appears to be confirmation bias here.

From MarketWatch • Apr. 10, 2026

We humans are already prone to confirmation bias: We tend to believe the information and opinions that confirm what we already think, even if we’re wrong.

From The Wall Street Journal • Mar. 21, 2026

Mahmood told MPs His Majesty's Chief Inspector of Constabulary Sir Andy Cooke had found "confirmation bias" in police intelligence gathering.

From BBC • Jan. 14, 2026

At first, I wondered if I was simply noticing them more — a trick of confirmation bias, maybe, because I spend my workdays steeped in stories about hunger and the policies meant to address it.

From Salon • Sep. 11, 2025