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history effect

history effect A history effect is a type of confounding in which changes that happen over time, rather than the variable being studied, account for the observed results.

A history effect is a type of confounding in which changes that happen over time, rather than the variable being studied, account for the observed results. In other words, the passage of time introduces another influence that can make findings misleading.

Also see

Sources

Drafting source: Online Statistics Education, version 2 (David M. Lane, project leader). Version 2; publisher statement snapshot 2026-10-18; SHA-256 0dcad9ee85f61f9e2bb24d26279de155ac749164ea4da2a3bffeabcf9ea471a6. “History Effect” (History_effect.html).
public-domain-US · Source snapshot SHA-256: 4eb4060c75ef41cc6295f6a12eebebe2b1c01a93b6f001563443e80905b20720

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PsychTerms (psychterms.org), CC BY 4.0, version 1. “history effect.” Development preview.

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