PS295 Lecture Notes - Lecture 16: Factorial Experiment, Design Matrix
Document Summary
Design: 2 (cell phone use: yes, no) x 2 (age: young, old) mixed factorial design, with cell phone use as the within-subjects factor and age as the between-subjects factor. Interaction effect of cell phone use and age. Design: 2 (method: mail, email) x 2 (attractive: yes, no) x 2 (gender: male, female) mixed factorial design, with method as the within-subjects factor and attractiveness and gender as between-subjects factors. 3 possible main effects: main effect of method, main effect of attractiveness, main effect of gender. 3 possible two way interaction effects: interaction between method and attractiveness, interaction between method and gender, interaction between gender and attractiveness. 1 possible 3 way interaction effects: interaction between method and attractiveness and gender. Compare the cell means of the design matrix. If the cell means are different, the effect of one factor depends on the level of the other factor. Compare the marginal means of the design matrix.
