Deck 11: Two-Way Factorial Repeated Anova

Question 1

When do you use a two-way factorial repeated measures ANOVA?

A) When you compare three or more group means where the participants are the same in each group
B) When you compare means from two conditions
C) When you compare the mean differences between groups with two repeated measures IVs
D) When you compare means from more than two conditions

Answer 1

C

Question 2

In a study looking at how scores may change across the different levels of an IV, how can you test this prediction?

A) Running the Games-Howell post hoc
B) Running a planned polynomial contrast
C) Running the Bonferroni post hoc test
D) Running both planned and post hoc contrasts

Answer 2

B

Question 3

Why should you use a Bonferroni corrected alpha when breaking down a significant interaction?

A) Because of the increased risk of a Type I Error when making multiple statistical tests
B) Because of the increased risk of a Type II Error when making multiple statistical tests
C) Because the assumption of homogeneity of variance has been violated
D) Because of non-normally distributed data

Answer 3

A

Question 4

Which of the following statements is not correct?

A) Sphericity can be calculated when an independent variable has two conditions.
B) The assumption of sphericity looks at the variability in the difference scores between conditions.
C) The Mauchly's test of sphericity is used to test the assumption of sphericity.
D) The assumption of sphericity tells if the experimental manipulation has a consistent effect on the differences between conditions.

Question 5

Which steps do you need to take to run a two-way repeated measures factorial ANOVA in SPSS?

A) Analyze > General Linear Model > Multivariate…
B) Analyze > Compare Means > Multivariate…
C) Analyze > General Linear Model > Repeated Measures…
D) Analyze > Compare Means > Repeated Measures…

Question 6

Which row of values from the SPSS output for the main effects and the interaction do you need to look at when the assumption of sphericity has been violated?

A) Sphericity Assumed
B) Lower-bound
C) Greenhouse-Geisser
D) Huynh-Feldt

Question 7

Which of the following statistics does the "Test of Within Subjects Effects" table in the output of a two-way repeated measures ANOVA not show?

A) F ratio
B) Degrees of Freedom
C) Standard Deviation
D) Mean Square

Question 8

Which parts of the analysis do you need to cover when writing up a two-way repeated measures ANOVA?

A) The assumption of sphericity, the main effect of independent variables
B) The assumption of sphericity, the main effect of both independent variables and the interaction
C) The main effect of both independent variables
D) The main effect of one independent variable and the interaction

Question 9

How do you break down a main effect when it is significant?

A) By the planned contrasts
B) By the repeated measures t tests
C) By the t tests
D) By the descriptive statistics and the planned or post hoc contrasts if there are more than two conditions in an independent variable

Question 10

How do you break down the interaction between independent variables when it is significant?

A) By the descriptive statistics and the graph
B) By the descriptive statistics, the graph, and the repeated measures t tests
C) By the descriptive statistics
D) By the repeated measures t tests

Question 11

In the worksheet exercise, why is there no result for Mauchly's test of sphericity for the main effect of therapy type?

A) Because it is significant
B) Because it is not significant
C) Because there are more than two conditions in the therapy type IV, so sphericity cannot be calculated.
D) Because there are only two conditions in the therapy type IV, so sphericity cannot be calculated.

Question 12

In the worksheet exercise, what are the correct degrees of freedom to report for the main effect of therapy type?

A) 1, 39
B) 1, 78
C) 2, 39
D) 2, 78

Question 13

In the worksheet exercise, what is the correct significance for the main effect of time?

A) .015
B) .020
C) .018
D) .041

Question 14

In the worksheet exercise, what was the effect size for the interaction?

A) .144
B) .002
C) .004
D) .102

Question 15

In the worksheet exercise, looking at the descriptive statistics for the interaction, at which time point do the therapy types differ most from each other?

A) They are the same at all three time points.
B) After the first session
C) After 16 weeks
D) After 32 weeks