covary

present singular third person covaries · participle present covarying · participle past covaried · past covaried

1. mathematicsTo vary together with another variable, particularly in a way that may be predictive

   More specifically, to say that there is an informative criterion of diachronic identity is to say that facts of diachronic identity covary with facts about continuants’ instantaneous qualitative profiles […].

   2007 July 18, Thomas Satting, “Identity in 4D”, in Philosophical Studies, volume 140, number 2, →DOI

   1 more example

   The participants certainly differ in how their practice is distributed (1, 2, or 3 days), but they also differ in how much total practice they get (3, 6, or 9 hours). This is a perfect example of a confound—it is impossible to tell if the results are due to one factor (distribution of practice) or the other (total practice hours); the two factors covary perfectly.

   2009, C. James Goodwin, Research In Psychology: Methods and Design, John Wiley & Sons, →ISBN, page 175