GLM Introductory Overview - Multiple Regression

Multiple Regression designs are to continuous predictor variables as main effect ANOVA designs are to categorical predictor variables, that is, multiple regression designs contain the separate simple regression designs for 2 or more continuous predictor variables. The regression equation for a multiple regression design for the first-order effects of 3 continuous predictor variables P, Q, and R would be

Y = b0 + b1P + b2Q + b3R

Between-subject designs

Within-subject (repeated measures) designs

Multivariate designs