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Factorial Design
Multiple indepdnetn variables
Benefits fo Factorial
examines multiple variables (efficient)
interaction effects: effect of an IV on the DV depends on the level of another IV
Interaction effects
Effect of IV on DV depends on level of another IV
Factorial labels
(Factors X levels)
2×2
3×2
main effect
examining the indepndent effects of each IV
ANOVA
Factorial deisgn
facotrial deesign

Cognitive examples
ID: race fo face, tool or weapon, time
Levels: 2,2,2
2×2×2
Problems to avoid
Problem: identifying interactions
Solution: greate a graph of the condition means to determine whether an interaction is present