Two Way ANOVA

1
Two Way ANOVA

• Lab 11

2
Example
Personality Trait A
Personality Trait B
Situation
In Public
n 20
n 20
In Private
n 20
n 20
3
Bar GraphsMain Effects Interactions
4
Bar GraphsMain Effects Interactions
A main effect of situation. No main effect of
personality.
Personality
Situation
Personality
A main effect of personality. No main effect of
situation
Situation
5
Bar GraphsMain Effects Interactions
Two main effects
6
Bar GraphsMain Effects Interactions
Two main effects
Personality
Situation
7
Bar GraphsMain Effects Interactions
Two main effects
Personality
Situation
8
Bar GraphsMain Effects Interactions
Two Main Effects and an Interaction
The effect of personaity is more pronounced in
public
9
Bar GraphsMain Effects Interactions
Two Main Effects and an Interaction
The effect of situation is more pronounced in
people who have trait B
Personality
Situation
10
Bar GraphsMain Effects Interactions
No Main Effects and an Interaction
11
Two Way ANOVA

• Provides Results of Three F-tests
• Is there a significant main effect of Factor 1?
• Is there a significant main effect of Factor 2?
• Is there a significant interaction effect?