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1. MARYLAND PSYC 355 Week 3 SPSS Homework 3
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PSYC 355 Week 3 SPSS Homework 3 NEW
SPSS HOMEWORK 3 INSTRUCTIONS
ONE-WAY ANOVA
Part 1:
Green & Salkind: Lesson 25, Exercises 1–3
The following helpful tips are numbered to
correspond with the exercise number to which
they refer (a dash indicates that no tips are
needed):
1. Use Tukey’s test as the post hoc test for
ANOVAs in PSYC 355. Be sure to check this box
when you run analyses. For letters a–d, instead
of identifying these values on your output, as the

2. text states, write them into your Word file as
written answers for #1 a, b, c, and d. (2 pts for
output and 2 pts each for a–d)
2. ---------- (3 pts)
3. Remember to put your dependent variable in
the “variable” box, and your independent, or
grouping, variables in the “category axis” box. (3
pts)
Part 2:
1. Twenty-four adults who have been diagnosed
with social anxiety disorder are randomly
assigned to one of 3 group therapy conditions in
order to improve their social skills: manualized
cognitive-behavioral therapy (MCBT), non-
manualized cognitive-behavioral therapy
(NMCBT), and talk therapy (T). Following two
months of therapy, the participants are assessed
on a standardized measure of social skills. On
this instrument, scores range from 0–45, and
higher scores indicate better or improved social
skills, while lower scores indicate social skills
that need improvement. Thesescores are shown
in the table below. Conduct a one-way ANOVA to
determine how effective these 3 therapy
conditions are at improving social skills.

3. The steps will be the same as the ones you have
been practicing in Part 1 of the assignment—the
only difference is that you are now responsible
for creating the data file as well. Remember to
name and define your variables under the
“Variable View,” then return to the “Data View”
to enter the data. (3)
MCBT
29, 32, 26,
33, 32, 37,
30, 38
NMCBT
31, 30, 28,
26, 31, 27,
29, 27
T
25, 20, 24,
26, 26, 30,
27, 25
2. What is the F ratio for the therapy group main
effect? (3)
3. What is the effect size for the overall effect of
therapy type on social skills scores? According

4. to general conventions, is this effect small,
medium, or large? (3)
4. Write a current APA-style Results section
based on your analyses. All homework “Results
sections” must follow the example given in the
SPSS tutorials and the Course Content
document“Writing Results of Statistical Tests in
APA Format” (note: you do not have to refer to a
figure). Remember to include a decision about
the null hypothesis. (3)
Part 3: Cumulative Homework
1. A researcher wanted to investigate whether
there was a difference in satisfaction ratings in
an assisted living facility between residents who
had a plant to take care of vs. those who did not
have a plant. Due to relocations during the
study, 3 participantswere dropped from the “No
Plant” group. The researcher then administered
a scale asking them to rate their overall
satisfaction with the facility. Did having a plant
have an impact on the residents’ overall
satisfaction levels? Choose the correct test to
analyze this question, set up the SPSS file, and

5. run the analysis. Followthe directions under the
table below (on next page).
Plan
47
42
35
46
49
39
40
46
52
40
No
Plant 30

6. 25
24
42
28
25
40
1. Paste appropriate SPSS output. (4)
2. Paste appropriate SPSS graph. (4)
3. Write a current APA-style Results
section based on your analyses. All
homework“Results sections” must follow the
example given in the SPSS tutorials and the
Course Content document “Writing Results of
Statistical Tests in APA Format” (note: you do
not have to refer to a figure). Remember to
include a decision about the null hypothesis.
(4)
This assignment is due by 11:59 p.m. (ET) on
Monday of Module/Week 3.