Which of the following assumptions would you need to test before you interpret the results of a two-way mixed ANOVA, where both variables have 3 experimental conditions?

⦁ A researcher was interested in the interaction between experience and mild intoxication on driving performance.  They recruited 40 drivers to complete a driving simulation task.  Half of the participants were highly experienced drivers, while the others were relatively inexperienced. Participants all completed the task under two conditions: once when they were sober; and again after drinking a low dose of alcohol.  Reaction times to hazards that appeared in the simulation were taken as the DV.  What statistical test should be used to analyse the data collected from this study?
Select one:

2×2 Repeated Measures ANOVA

3×2 Independent ANOVA

Two-Way Mixed ANOVA

Three-Way Independent ANOVA

⦁ How many data points would each participant provide for an experiment which is analysed using a Repeated Measures 2×2 ANOVA?  (Hint: think about how many columns you would need to enter their actual performance scores into when setting up an SPSS data file).
Select one:

1

2

4

You can’t tell from the information provided.

⦁ Which of the following assumptions would you need to test before you interpret the results of a two-way mixed ANOVA, where both variables have 3 experimental conditions?
Select one:

Neither sphericity nor homogeneity of variance

Both sphericity and homogeneity of variance

Homogeneity of variance

Sphericity