Project #2 – Psychology 143
Spring 2019 – Yockey
Project 2 – Psychology 143
Name ____________________________________________
Project #2 – Psychology 143
Spring 2019 – Yockey
Complete each of the following problems, answering each question as completely as possible. You will need to use SPSS to answer a number of the questions. You may use your text and any other class materials as needed. The project is due by 5/7 at 2 pm (you are welcome to turn it in early if you like). You may either 1) email the project to me as an attachment (as a Word or PDF file please) or 2) turn it in at the psychology office (where it will be date and time stamped). SPSS output is not required to be turned in with your project.
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1. The following output is from a multiple regression analysis that was run on the variables FEARDTH (fear of death) IMPORTRE (importance of religion), AVOIDDTH (avoidance of death), LAS (meaning in life), and MATRLSM (materialistic attitudes). In the regression analysis, FEARDTH is the criterion variable (Y) and IMPORTRE, AVOIDDTH, LAS, and MATRLSM are the predictors (Xs). The SPSS output is provided below, followed by a number of questions (12 points total).
Descriptive Statistics
Mean
Std. Deviation
N
feardth
27.0798
8.08365
163
importre
5.8282
2.46104
163
avoiddth
18.5460
6.97633
163
Las
70.1288
9.89460
163
matrlsm
53.5552
XXXXXXXXXX
163
Variables Entered/Removed
Model
Variables Entered
Variables Removed
Method
1
matrlsm, avoiddth, importre, lasa
.
Ente
a. All requested variables entered.
b. Dependent Variable: feardth
XXXXXXXXXXModel Summary
Model
R
R Square
Adjusted R Square
Std. E
or of the Estimate
1
.669
.447
.433
6.08700
a. Predictors: (Constant), matrlsm, avoiddth, importer, las
ANOVA
Model
Sum of Squares
df
Mean Square
F
Sig.
1
Regression
XXXXXXXXXX
4
XXXXXXXXXX
31.927
.000a
Residual
XXXXXXXXXX
158
37.052
Total
XXXXXXXXXX
162
a. Predictors: (Constant), matrlsm, avoiddth, importre, las
b. Dependent Variable: feardth
Coefficientsa
Model
Unstandardized Coefficients
Standardized Coefficients
T
Sig.
B
Std. E
o
Beta
1
(Constant)
27.738
4.979
5.571
.000
importre
-.167
.199
-.051
-.838
.403
avoiddth
.697
.070
.601
10.004
.000
Las
-.213
.050
-.261
-4.247
.000
matrlsm
.044
.049
.055
.885
.378
a. Dependent Variable: feardth
Answer the following questions for the regression procedure:
a. How many people were in the study? _____________ (1 point)
. What is R2 for the regression analysis? ________________ (2 points)
c. Is R2 significant? Report the appropriate statistical criteria to support your answer (do not just provide the p-value, but the APA formatted information as appropriate) (3 points).
d. Which predictor(s), if any, are significant? Which predictor(s), if any, are not significant? Be sure to (1) indicate whether each predictor is significant or not and (2) report the co
esponding t values and p-values for each of the predictors (whether significant or not) below (4 points).
e. Write the final equation for the regression model. (Consult your text as needed for details on writing the regression equation.) (2 points)
2. A research study was conducted to assess the effectiveness of an 8-week GRE study preparation course (e.g., Kaplan) on GRE test scores. Six subjects were selected to participate in the study, and took the GRE test on three occasions, with the prep course employed for an eight week period starting after the first study session (week 0). The dependent variable is the GRE score, with higher scores indicating better performance on the test (10 points total).
GRE
week 0
GRE
week 4
GRE
week 8
Subject 1
980
1070
1180
Subject 2
1030
1040
1240
Subject 3
1010
970
1260
Subject 4
930
1040
1110
Subject 5
1010
1110
1140
Subject 6
1130
1050
1210
a. State the null and alternative hypotheses for the overall test (2 points).
. Interpret the results of the SPSS output below (use α = .05). Describe the results in the context of the study and use APA format as appropriate. If the overall test is significant, be sure to conduct and report the results (in APA format) of any further tests as appropriate (use a total α = .05 for the set of follow-up tests) (8 points).
3. A researcher was interested in examining if a relationship existed between two variables, X and Y. Five people were selected for the study, and their scores on X and Y are shown below (8 points total).
X
Y
12
14
9
11
13
17
11
19
14
13
a. State the null and alternative hypotheses below (2 points).
. Report the results of the hypothesis test below. Be sure to express the results in the context of the study and use APA format as appropriate. Use α = XXXXXXXXXXpoints).
4. An experiment was conducted to examine the performance (as measured by the number of e
ors made) on a motor skills task. Twenty-four subjects (12 young and 12 old) were assigned to either an easy or hard motor skills task. There were two factors in the study: age (young/old) and difficulty of the motor skills task (easy/hard). The number of e
ors made on the motor skills task was recorded for each person and is presented in the table below (15 points).
Difficulty
Easy
Hard
Age
Young
3
4
2
6
3
6
6
5
8
9
9
7
Old
5
7
6
4
2
4
10
11
14
15
16
17
a. State the null and alternative hypotheses below (2 points).
.
Report the results of the hypothesis tests in #a below. Be sure to express the results in the context of the study and use APA format as appropriate. Sketch, label, and describe any significant interaction(s). (For your sketch, it is fine to make it look like the plot shown in SPSS.) Use α = .05 for each test (13 points)
CONTINUED ON THE NEXT PAGE
Extra Credit (2 points). Provide an example (that has not been used in class or in your text) of a two-way between subjects ANOVA. For full extra credit, state each IV (including all levels) and the DV in sufficient detail below so that I am able to properly evaluate your example as being appropriate for the two-way ANOVA. It is not necessary to provide values (i.e., data) with your example.
This completes the project. Congratulations on finishing project #2!