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bias

BY-uhs /ˈbaɪəs/

nounverbB2GRESATTOEFLIELTS

generalformal

As a noun: Prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair. As a verb: To cause to feel or show inclination or prejudice for or against someone or something.

In science, bias can subtly or overtly distort results, leading to inaccurate conclusions. It can arise from researcher expectations, participant selection, measurement errors, or interpretation.

The story behind the word. The word 'bias' comes from the Old French 'biais,' meaning 'slant' or 'slope.' It originally referred to a diagonal line or cut, particularly in tailoring. This sense of 'slant' gradually evolved to mean an inclination or tendency, especially an unfair one, by the 16th century. The idea is that something 'biased' is not straight or neutral, but leans in a particular direction.

Word relationships

prejudice: Prejudice is a preconceived opinion not based on reason or actual experience, often negative; bias is a general inclination or leaning, which can be conscious or unconscious.
partiality: Partiality implies favoritism or an unfair preference for one side.
slant: Slant suggests presenting information in a way that favors a particular viewpoint.

objectivity: The quality of being unbiased and factual.
impartiality: Fairness and neutrality, without favoring one side.

Word family

biased (adjective): Having or showing an unfair tendency to believe that some people, ideas, etc., are better than others.
unbiased (adjective): Showing no prejudice for or against something; impartial.

Collocations

unconscious bias
confirmation bias
selection bias
sampling bias
political bias
gender bias

Idioms & expressions

have a bias towards/against

Example sentences

"The study was criticized for its potential bias, as the researchers had a financial stake in the outcome." It's crucial to minimize bias in scientific research.
"News channels are often accused of political bias, presenting stories in a way that favors one party over another." Media often faces accusations of political bias.

Memory hook

Imagine a 'BY-ASS' (bias) who always takes a slanted path, never going straight, showing his unfair preference. BY-ASS: Slanted opinion.

When not to use

Do not use 'bias' to simply mean 'preference' if there's no implication of unfairness or distortion. For example, 'I have a bias for chocolate' is less precise than 'I prefer chocolate.'

Fun facts

In statistics, 'bias' refers to a systematic error in a statistical estimate, where the expected value of the estimate differs from the true underlying quantitative parameter.