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systematic error

error in which the data values obtained from a sample deviate by a fixed amount from the true values within the population. For example, a scale that repeatedly provides readings 0.5 g lower than the true weight would be demonstrating systematic error. Systematic errors tend to be consistently positive or negative and may occur as a result of sampling bias or measurement error. Compare random error.

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Psychology term of the day

April 17th 2024

lip pursing

lip pursing

a facial contortion in which the lips protrude in a manner that resembles pouting or a snout. First described (as Schnauzkrampf) by German psychiatrist Karl Ludwig Kahlbaum (1828–1899), it is most commonly associated with catatonic schizophrenia.