1. Experimental Design

2. The Good, The Bad, & The Ugly+ +
F =

3. The Good, The Bad, & The Ugly
Primary 2
Secondary 2
Error 2 + +
F =

4. The Good, The Bad, & The Ugly
Error 2
Random, moves
subjects apart
within groups
Secondary 2
Systematic, moves means
apart
Primary 2
Systematic, moves means
apart + +
F =

5. The Good, The Bad, & The Ugly
Primary 2
Error 2
Secondary 2 +
F =
Eliminating Secondary Variances Eliminates Confounds; No Generalizability

6. The Good, The Bad, & The Ugly
Primary 2
Error 2
Secondary 2 +
F =
Tight Experimental Control Reduces Error Variance, Increases Power

7. The Good, The Bad, & The Ugly
Primary 2
Error 2 +
F = +
Counterbalancing Increases Generalizability but Reduces Power

8. The Good, The Bad, & The Ugly
IV1: Primary 2
IV2: Primary 2
Error 2 + +
F =
Make Jessica an Independent Variable: Do a 2-way ANOVA
Increases Generalizability & Power
AND You get to look at Complex Relationships (Interactions)

9. The Good, The Bad, & The Ugly
IV1: Primary 2
Error 2 +
F =

10. The Good, The Bad, & The Ugly
IV2: Primary 2
Error 2 +
F =

11. The Good, The Bad, & The Ugly
Interaction 2
Error 2 X +
F =

12. The Good, The Bad, & The Ugly
Interaction 2
Error 2 X +
F =