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1. MARYLAND PSYC 355 Week 2 SPSS Homework 2
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PSYC 355 Week 2 SPSS Homework 2 NEW
SS Homework 2 Instructions
Independent Samples t-Tests
Part 1:
Green & Salkind: Lesson 24, Exercises 1–5
The following helpful tips are numbered to
correspond with the exercise number to which
they refer:
1. Type these values out underneath your
copied and pasted output. (3 pts)
2. Instead of identifying these values on
your output, as the text states, write them in
your Word file as written answers for #2 a, b,
and c. (3 pts, 1 point for each letter)

2. 3. The effect size statistic must be computed
by hand (or calculator). Use the second
“easier” formula for d, found in the section on
Effect Size Statistics in this lesson. (3 pts)
4. All homework “Results sections” must
follow the example given in the Course
Content document “Writing Results of
Statistical Tests in Current APA Format” (Note:
you do not have to refer to a figure). (3 pts)
5. Create a boxplot (not an error bar graph)
using the following steps (covered also in
Lesson 21). (3 pts)
Go to Graphs > Legacy Dialogs > Boxplot > Select
“Simple” > Select “Summaries for Groups of
Cases”
Click “Define” and Variable = “Time Spent” (this
is your dependent variable) and Category Axis =
“Weight” (this is your independent, or grouping,
variable)
Click OK
Part 2:
1. A learning psychologist is interested in
comparing the success of 2 different mnemonics
(memorization methods) on performance in a
memory task. He assigns students to two groups,

3. one which learns and uses a language-based
rhyming memory technique, and one which
learns and uses a visual “method of loci” spatial
memory technique. He then administers a
memory task to each group of students. The
students are scored based on the percentage of
correct answers. Using the table below, enter the
data into a new SPSS data file and use an
independent-samples t test to analyze the claim
that the two mnemonic styles are different.
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 for output)
Table is shown on following page.
Language-
Based
82
89
67
94
76
63

4. 89
84
93
Spatially-
Based
93
78
99
87
78
62
87
91
95
2. Create a boxplot illustrating the differences
between the two methods of language learning.
(3)
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

5. “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)
Part 3: Cumulative Homework
1. The effects of a new faith-based anxiety
treatment program are studied in a group of
elderly patients with Generalized Anxiety
Disorder (GAD). One of the outcome measures is
the Geriatric Anxiety Inventory (GAI) (Pachana
et al., 2007), a measure with possible scores
from 0–20, with higher scores indicating higher
anxiety. A large group of elderly patients
completed the GAI before treatment. Fifteen
patients with GAI scores of 10 or higher were
chosen to participate in the study. The patients
underwent the treatment program and
completed the GAI at the end of treatment. The
scores are listed below. Do the elderly patients
exhibit lessened anxiety, as demonstrated by
their GAI scores, after participating in the faith-
based treatment program? Choose the correct
test to analyze this question, set up the SPSS file,
and run the analysis. Follow the directions under
the table below.
GAI Score GAI Score

6. Before
Treatment
After
Treatment
10
12
17
13
10
13
16
11
11
15
18
11
11
14
15
7
11
12
14
9
10
12
11
13
13
17
9
13
10
12
1. Paste appropriate SPSS output. (5)
2. Paste appropriate SPSS graph. (5)

7. 3. Write a current APA-style Results section
based on your analyses. All homework
“Results sections” should 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.
(5)
This assignment is due by 11:59 p.m. (ET) on
Monday of Module/Week 2.