Regression toward the mean


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

Regression toward the mean

The tendency that a random variable will ultimately have a value closer to its mean value.
References in periodicals archive ?
We also compared both solutions with an untreated control group, a comparison that is rarely performed but which is necessary to control for regression toward the mean.
The student must estimate the future consequences implied by the regression toward the mean concept and the beta values given.
During expansion in the 1990s, a large percentage of risk contract enrollees tended to be recent joiners, who may be healthier than long-term enrollees because of regression toward the mean (Welch, 1985; Riley, Rabey, and Kasper, 1989).
Any factor that reduces the correlation between two sets of scores contributes to regression toward the mean.
Regression toward the mean, indicated by not focusing on the instruction of high achieving students, did not seem to occur in this data set.
The institutional number represents regression toward the mean, and does not provide the data required to create a plan to address problem areas.