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Original · left

Regression (psychology)

First in use: the 1890s
Duplicate · right

Regression analysis

First in use: c. 1886

Regression / Regression (psychology) / Regression analysis

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Duplicate share · 12 mo—
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Galton's statistics vs. Freud's defense mechanism.

Which meaning of Regression is the original, and which one is the duplicate riding on its name? Regression (psychology) came first (the 1890s). Regression analysis arrived in 1886. The data below shows which one owns the word now.

Wikipedia pageviews since 2015

Regression (psychology)Regression analysis
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Duplicate's share of attention

Green line = duplicate's % · above 60 it owns the word · below 40 the original does

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The case for each meaning

Sourced definitions, usage stats and quotes

Original · the 1890s

Regression (psychology)

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Duplicate · c. 1886

Regression analysis

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More duplicated terms

AI & machine learning