Week 4

Question 1

What is a two-way interaction?

Answer 1

Where the effect of a factor depends on the level of another factor, averaging over the levels of a third factor.

Question 2

Name the omnibus tests in a three-way design.

Answer 2

Three main effect test.
Three two-way interactions.
One three-way interaction.

Question 3

What are simple interaction effects?

Answer 3

First follow up of three-way interaction, using F tests.

Question 4

What are simple simple effects?

Answer 4

Second follow up of three-way interaction, using F tests.

Question 5

What are simple simple comparisons?

Answer 5

The third follow up of three-way interactions, using t-tests.