An experimental design in which the response variable is measured more than once on each experimental unit.
Covariate
A predictor variable that isĀ regressedĀ on the response rather than being used to classify the experimental units into groups.
Analysis of covariance
A statistical analysis that combines ANOVA with simple linear regression in the sense that at least one predictor variable is a factor and at least one predictor variable is a covariate.