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11 Cards in this Set
- Front
- Back
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What type of ANOVA has one independent variable for which groups differ? |
1 WAY ANOVA |
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What type of ANOVA has two or more independent variables for which the groups differ? |
2-WAY ANOVA |
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What are two advantages for using a factorial design? |
It is more efficient and allows testing for interaction effects |
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What is a factorial design? |
Research design where you can study 2 or more factors/independent variables. |
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What is a 2x2 design? |
A design where there are 2 factors and each factor has two levels (4 groups). |
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What are the marginal means in a factorial design? |
Average scores calculated over one level of one factor, while letting the other factor vary |
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What is a main effect in a factorial design? |
Differences in the marginal means |
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What is an interaction effect in a factorial design? |
Variations in the pattern of differences across rows or columns -Is there a difference between the rows and columns? |
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What happens when 2 factors interact? |
The effect of one factor varies, depending on the level of the other factor. |
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How can you identify a main effect from a graph? |
Different average heights of lines (or bars) |
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How can you identify an interaction effect from a graph? |
Different patterns across bars or nonparallel lines |
