Description
Run a reliability analysis using the Lesson 37 Exercise File 1. Specifically, you are to:
- Reverse scale the appropriate items so that a higher total score reflects a greater emphasis on career.
- Compute a reliability analysis on the total score, using coefficient alpha.
- Conduct the analysis again, this time computing a split-half reliability coefficient and justify the method you used to split the items.
- Identify which estimate of reliability is the more appropriate one and why.
To prepare for this Assignment:
- Consider which reliability analysis will be most informative for your research.
- Review Lessons 37 and 38 in the Green and Salkind text:
- Lesson 37, “Internal Consistency and Estimates of Reliability”
- Lesson 38, “Item Analysis Using Reliability Procedure”
- Access Lesson 37 Exercise File 1 from the Pearson website: http://www.pearsonhighered.com/greensalkindSPSS
- Review the Assignment Exemplar document provided in this week’s Learning Resources.
Submit a 3- to 4-page paper using the Assignment Exemplar.
Your paper must include the following elements:
- An APA Results Section based upon your analyses (see pages 299–300 of the Green and Salkind text as an example)
- An appendix including the SPSS output generated for the reliability analysis (see page 299 of the Green and Salkind text)
Run a reliability analysis using the Lesson 37 Exercise File 1. Specifically, you are to:
•
Reverse scale the appropriate items so that a higher total score reflects a greater emphasis on
career.
•
Compute a reliability analysis on the total score, using coefficient alpha.
•
Conduct the analysis again, this time computing a split-half reliability coefficient and justify the
method you used to split the items.
•
Identify which estimate of reliability is the more appropriate one and why.
To prepare for this Assignment:
•
Consider which reliability analysis will be most informative for your DIT research.
•
Review Lessons 37 and 38 in the Green and Salkind text:
o
Lesson 37, “Internal Consistency and Estimates of Reliability”
o
Lesson 38, “Item Analysis Using Reliability Procedure”
•
Access Lesson 37 Exercise File 1 from the Pearson
website: http://www.pearsonhighered.com/greensalkindSPSS
•
Review the Assignment Exemplar document provided in this week’s Learning Resources.
Submit a 3- to 4-page paper using the Assignment Exemplar.
Your paper must include the following elements:
•
An APA Results Section based upon your analyses (see pages 299–300 of the Green and Salkind
text as an example)
•
An appendix including the SPSS output generated for the reliability analysis (see page 299 of the
Green and Salkind text)
Complete
Student submits a 3- to 4-page paper using the
Assignment Exemplar.
Results
Section
Student presents an APA Results Section based upon
analysis of the reliability.
Appendix
Student presents an appendix which includes the SPSS
output generated for the reliability analysis.
1
Week Seven Reliability Analysis Exemplar Template
Research Question
Is the emotional control scale a reliable instrument?
Hypotheses
H0: The Emotional Control Scale is not a reliable instrument.
H1: The Emotional Control Scale is a reliable instrument.
Results
Two internal consistency estimates of reliability were computed for the
Emotional Control scale: a split-half coefficient expressed as a Spearman-Brown
corrected correlation and coefficient alpha. For the split-half coefficient, the scale was
split into two halves such that the two halves would be as equivalent as possible. In
splitting the items, we took into account the sequencing of the items as well as whether
items assessed control of emotion or expression of emotion. One of the halves included
items 1, 3, 5, 8, and 10, while the other half included items 2, 4, 6, 7, and 9. Values for
coefficient alpha and the split half coefficient were the same, .87, each indicating
satisfactory reliability. The XXXX method is most appropriate because (justify the most
appropriate method). Appendix A depicts the SPSS output generated from the coefficient
alpha analysis. Appendix B depicts the SPSS output generated from the split-half
reliability analysis.
2
Appendix A
Reliability Statistics
Cronbach’s
Alpha
Cronbach’s
Alpha Based on
Standardized
Items
.872
.872
N of Items
10
Item Statistics
item1
item2
item3
item4
item5
item6
item7
item8
item9
item10
Mean
Std. Deviation
1.92
1.307
2.16
1.201
2.20
.990
1.98
1.301
2.00
1.143
2.20
1.278
2.34
1.118
2.10
1.249
2.34
1.118
2.08
1.291
N
50
50
50
50
50
50
50
50
50
50
3
Inter-Item Correlation Matrix
item1
item2
item3
item4
item5
item6
item7
item8
item9
item10
item1
1.000
.463
.470
.407
.451
.352
.452
.517
.368
.427
item2
.463
1.000
.419
.446
.520
.378
.460
.560
.308
.439
item3r
.470
.419
1.000
.463
.307
.436
.472
.446
.417
.259
item4r
.407
.446
.463
1.000
.453
.481
.426
.365
.285
.475
item5
.451
.520
.307
.453
1.000
.405
.192
.500
.224
.401
item6r
.352
.378
.436
.481
.405
1.000
.409
.537
.209
.312
item7
.452
.460
.472
.426
.192
.409
1.000
.487
.445
.334
item8r
.517
.560
.446
.365
.500
.537
.487
1.000
.267
.450
item9r
.368
.308
.417
.285
.224
.209
.445
.267
1.000
.348
item10
.427
.439
.259
.475
.401
.312
.334
.450
.348
1.000
4
Appendix B
Reliability Statistics
Part 1
Cronbach’s Alpha
Part 2
Total N of Items
Correlation Between Forms
Spearman-Brown Coefficient
Equal Length
Unequal Length
Guttman Split-Half Coefficient
a. The items are: item1, item3, item5, item8, item10.
b. The items are: item2, item4, item6, item7, item9.
Value
N of Items
Value
N of Items
.786
5a
.757
5b
10
.775
.873
.873
.873
Purchase answer to see full
attachment
•
Reverse scale the appropriate items so that a higher total score reflects a greater emphasis on
career.
•
Compute a reliability analysis on the total score, using coefficient alpha.
•
Conduct the analysis again, this time computing a split-half reliability coefficient and justify the
method you used to split the items.
•
Identify which estimate of reliability is the more appropriate one and why.
To prepare for this Assignment:
•
Consider which reliability analysis will be most informative for your DIT research.
•
Review Lessons 37 and 38 in the Green and Salkind text:
o
Lesson 37, “Internal Consistency and Estimates of Reliability”
o
Lesson 38, “Item Analysis Using Reliability Procedure”
•
Access Lesson 37 Exercise File 1 from the Pearson
website: http://www.pearsonhighered.com/greensalkindSPSS
•
Review the Assignment Exemplar document provided in this week’s Learning Resources.
Submit a 3- to 4-page paper using the Assignment Exemplar.
Your paper must include the following elements:
•
An APA Results Section based upon your analyses (see pages 299–300 of the Green and Salkind
text as an example)
•
An appendix including the SPSS output generated for the reliability analysis (see page 299 of the
Green and Salkind text)
Complete
Student submits a 3- to 4-page paper using the
Assignment Exemplar.
Results
Section
Student presents an APA Results Section based upon
analysis of the reliability.
Appendix
Student presents an appendix which includes the SPSS
output generated for the reliability analysis.
1
Week Seven Reliability Analysis Exemplar Template
Research Question
Is the emotional control scale a reliable instrument?
Hypotheses
H0: The Emotional Control Scale is not a reliable instrument.
H1: The Emotional Control Scale is a reliable instrument.
Results
Two internal consistency estimates of reliability were computed for the
Emotional Control scale: a split-half coefficient expressed as a Spearman-Brown
corrected correlation and coefficient alpha. For the split-half coefficient, the scale was
split into two halves such that the two halves would be as equivalent as possible. In
splitting the items, we took into account the sequencing of the items as well as whether
items assessed control of emotion or expression of emotion. One of the halves included
items 1, 3, 5, 8, and 10, while the other half included items 2, 4, 6, 7, and 9. Values for
coefficient alpha and the split half coefficient were the same, .87, each indicating
satisfactory reliability. The XXXX method is most appropriate because (justify the most
appropriate method). Appendix A depicts the SPSS output generated from the coefficient
alpha analysis. Appendix B depicts the SPSS output generated from the split-half
reliability analysis.
2
Appendix A
Reliability Statistics
Cronbach’s
Alpha
Cronbach’s
Alpha Based on
Standardized
Items
.872
.872
N of Items
10
Item Statistics
item1
item2
item3
item4
item5
item6
item7
item8
item9
item10
Mean
Std. Deviation
1.92
1.307
2.16
1.201
2.20
.990
1.98
1.301
2.00
1.143
2.20
1.278
2.34
1.118
2.10
1.249
2.34
1.118
2.08
1.291
N
50
50
50
50
50
50
50
50
50
50
3
Inter-Item Correlation Matrix
item1
item2
item3
item4
item5
item6
item7
item8
item9
item10
item1
1.000
.463
.470
.407
.451
.352
.452
.517
.368
.427
item2
.463
1.000
.419
.446
.520
.378
.460
.560
.308
.439
item3r
.470
.419
1.000
.463
.307
.436
.472
.446
.417
.259
item4r
.407
.446
.463
1.000
.453
.481
.426
.365
.285
.475
item5
.451
.520
.307
.453
1.000
.405
.192
.500
.224
.401
item6r
.352
.378
.436
.481
.405
1.000
.409
.537
.209
.312
item7
.452
.460
.472
.426
.192
.409
1.000
.487
.445
.334
item8r
.517
.560
.446
.365
.500
.537
.487
1.000
.267
.450
item9r
.368
.308
.417
.285
.224
.209
.445
.267
1.000
.348
item10
.427
.439
.259
.475
.401
.312
.334
.450
.348
1.000
4
Appendix B
Reliability Statistics
Part 1
Cronbach’s Alpha
Part 2
Total N of Items
Correlation Between Forms
Spearman-Brown Coefficient
Equal Length
Unequal Length
Guttman Split-Half Coefficient
a. The items are: item1, item3, item5, item8, item10.
b. The items are: item2, item4, item6, item7, item9.
Value
N of Items
Value
N of Items
.786
5a
.757
5b
10
.775
.873
.873
.873
Purchase answer to see full
attachment
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