covariation

The number of heads does not vary, and heritability is a measure of covariation (I use the term "covariation" in a non-technical sense here).

ScienceBlogs Channel : Life Science 2009

In their business-cycle model, realistic fluctuations in the rate of technological development brought about a covariation between GDP, consumption, investments and hours worked close to that observed in actual data.

Kydland and Prescott win Nobel, Arnold Kling | EconLog | Library of Economics and Liberty 2009

To do so, we measured the strength of selection, estimated genetic variation and covariation, and predicted the response to selection for women in the Framingham Heart Study, a project of the National Heart, Lung, and Blood Institute and Boston University that began in 1948.

tingilinde: 2009

Second, because the underlying model starts with the covariation between all races, you will see very small changes in the trend estimates for every race (usually no more than a tenth of a percent or two) whenever we add a new poll to any race.

Upgrading Pollster's Trend Lines: The Kalman Filter The Huffington Post News Team 2010

Second, because the underlying model starts with the covariation between all races, you will see very small changes in the trend estimates for every race (usually no more than a tenth of a percent or two) whenever we add a new poll to any race.

Upgrading Pollster's Trend Lines: The Kalman Filter The Huffington Post News Team 2010

To do so, we measured the strength of selection, estimated genetic variation and covariation, and predicted the response to selection for women in the Framingham Heart Study, a project of the National Heart, Lung, and Blood Institute and Boston University that began in 1948.

more on current natural selection in humans 2009

What is being measured is covariation, not explanation.

Matthew Yglesias » The Impact of Title IX 2010

Espen sez, I thought you would appreciate this cartoon that explains the difference between covariation and causality.

Boing Boing 2008

Cartoon explains the difference between causality and covariation

Boing Boing 2008

The covariation of reference with alternative facts about the context could, however, correspond to our imperfect knowledge of the settled (pre-semantic) facts that determine meaning.

Names Cumming, Sam 2009