Assignment 11: Two-Factor ANOVA
Due at start of class on 26 April, 2006.

Name:

Each question is worth one half a point unless otherwise indicated.

A researcher performed an experiment on prospective memory (the ability to remember to perform future tasks.) The experiment investigated various types of reminders (cues) to see if each aided prospective memory. The researcher used a factorial, between-subjects design with two independent variables (IVs). The first IV was whether the cue reminded the person when to perform the task or not (Cue When Absent vs Cue When Present - String vs Cue When Present - Post-It Note.) The second IV was whether the cue reminded the person what task to perform or not (Cue What Absent vs Cue What Present.) Twelve people participated in each condition. The number of tasks that each person remembered to perform at the appropriate time are shown below:
Cue When
AbsentStringPost It Note
Cue WhatAbsent 4
4
3
4
5
3
4
3
3
3
4
4
3
7
3
7
7
5
5
5
6
3
7
6
4
7
6
4
3
7
7
6
6
3
3
3
Present 5
3
5
4
6
4
3
6
3
7
4
7
4
3
8
4
9
4
3
9
8
6
3
6
4
8
6
8
6
10
4
9
8
11
5
6

1. Write H0 for the main effect of Cue-When:
2. Write H0 for the main effect of Cue-What:
3. Write H0 for the interaction effect of Cue-When and Cue-What:
4. Are these one- or two-tailed hypotheses?
One-Tailed
Two-Tailed
5. What α level will you use?
6. What is the marginal mean response to the Cue When Absent conditions?
7. What is the marginal mean response to the Cue What Present conditions?
8. What is the mean response to the Cue When - String, Cue What Present condition?
9. According to Levene's test for equality of variances, has the homogeneity of variance assumption been met? If so, is the violation important?
The assumption has not been violated.
The assumption has been violated, but the violation is not important.
The assumption has been violated, and the violation is important.
10. Look at a graph of the data. Is it likely that the main effect of Cue When is present?
No
Yes
11. Look at a graph of the data. Is it likely that the main effect of Cue What is present?
No
Yes
12. Look at a graph of the data. Is it likely that the interaction effect of Cue What and Cue When is present?
No
Yes
13. From the ANOVA summary table, can we reject H0 for the main effect of Cue When? Yes No
14. Write the F ratio for the main effect of Cue When in appropriate APA style:
15. From the ANOVA summary table, can we reject H0 for the main effect of Cue What? Yes No
16. Write the F ratio for the main effect of Cue What in appropriate APA style:
17. From the ANOVA summary table, can we reject H0 for the interaction effect of Cue What and Cue When? Yes No
18. Write the F ratio for the interactioin effect of Cue What and Cue When in appropriate APA style:
19. Consult the Tukey multiple comparison section of the output. Summarize which levels of the Cue When variable are not reliably different from each other
20. Save ALL of your SPSS output to a file named as your last name. Email me the SPSS output file (the .spo file).

When you are all done with the questions, click on the submit button. Your answers are not submitted unless you click on the button, receive confirmation that your answers have been received, and email your SPSS output to me.

If you do not submit your SPSS output, you will automatically receive a grade of 0 on this assignment.