Test Yourself

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A1 A2
B1 6 4
B2 4 6

1. In the table above, is there a

Experiment A
A1 A2
B1 4 1
B2 6 1

Experiment B
A1 A2
B1 4 6
B2 6 4

2. For which experiment (see tables above) are you more confident that the psychological effect of Variable A depends on the level of Variable B?

Experiment A
A1 A2
B1 5 7
B2 6 7

Experiment B
A1 A2
B1 4 6
B2 6 4

3. For which experiment (see tables above) is the interaction most likely to be due to an artifact of having ordinal data?
4. If you use an interval measure, such as a rating scale, you will not have an ordinal interaction.
5. If you have an ordinal interaction, it means that the interaction is a result of having ordinal data.
6. If your measure (a knowledge test) is too difficult, you may have floor effects that result in an ordinal interaction.



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