What follows is the SPSS output from the item analysis of questionnaire 4561. The response-frequency analysis of each item is followed by the distribution of total summed scores; after that the traditional item analysis statistics are presented.
01-Apr-96 SPSS Release 4.0 for Macintosh
S4561Q1
Valid Cum
Value Label Value Frequency Percent Percent Percent
4 2 8.7 8.7 8.7
5 4 17.4 17.4 26.1
6 12 52.2 52.2 78.3
7 5 21.7 21.7 100.0
------- ------- -------
Total 23 100.0 100.0
Mean 5.870 Std err .181 Median 6.000
Mode 6.000 Std dev .869 Variance .755
Kurtosis .200 S E Kurt .935 Skewness -.641
S E Skew .481 Range 3.000 Minimum 4.000
Maximum 7.000 Sum 135.000
Valid cases 23 Missing cases 0
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
S4561Q2
Valid Cum
Value Label Value Frequency Percent Percent Percent
1 2 8.7 8.7 8.7
4 2 8.7 8.7 17.4
5 4 17.4 17.4 34.8
6 10 43.5 43.5 78.3
7 5 21.7 21.7 100.0
------- ------- -------
Total 23 100.0 100.0
Mean 5.435 Std err .343 Median 6.000
Mode 6.000 Std dev 1.647 Variance 2.711
Kurtosis 3.151 S E Kurt .935 Skewness -1.781
S E Skew .481 Range 6.000 Minimum 1.000
Maximum 7.000 Sum 125.000
Valid cases 23 Missing cases 0
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
S4561Q3
Valid Cum
Value Label Value Frequency Percent Percent Percent
2 1 4.3 4.3 4.3
4 1 4.3 4.3 8.7
5 3 13.0 13.0 21.7
6 10 43.5 43.5 65.2
7 8 34.8 34.8 100.0
------- ------- -------
Total 23 100.0 100.0
Mean 5.957 Std err .247 Median 6.000
Mode 6.000 Std dev 1.186 Variance 1.407
Kurtosis 4.741 S E Kurt .935 Skewness -1.878
S E Skew .481 Range 5.000 Minimum 2.000
Maximum 7.000 Sum 137.000
Valid cases 23 Missing cases 0
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
S4561Q4
Valid Cum
Value Label Value Frequency Percent Percent Percent
1 1 4.3 4.3 4.3
2 3 13.0 13.0 17.4
3 3 13.0 13.0 30.4
4 3 13.0 13.0 43.5
5 5 21.7 21.7 65.2
6 4 17.4 17.4 82.6
7 4 17.4 17.4 100.0
------- ------- -------
Total 23 100.0 100.0
Mean 4.565 Std err .382 Median 5.000
Mode 5.000 Std dev 1.830 Variance 3.348
Kurtosis -.965 S E Kurt .935 Skewness -.309
S E Skew .481 Range 6.000 Minimum 1.000
Maximum 7.000 Sum 105.000
Valid cases 23 Missing cases 0
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
SC4561
Valid Cum
Value Label Value Frequency Percent Percent Percent
8.00 1 4.3 4.3 4.3
16.00 1 4.3 4.3 8.7
18.00 2 8.7 8.7 17.4
19.00 2 8.7 8.7 26.1
20.00 1 4.3 4.3 30.4
21.00 3 13.0 13.0 43.5
22.00 2 8.7 8.7 52.2
23.00 4 17.4 17.4 69.6
24.00 1 4.3 4.3 73.9
25.00 1 4.3 4.3 78.3
26.00 2 8.7 8.7 87.0
28.00 3 13.0 13.0 100.0
------- ------- -------
Total 23 100.0 100.0
Mean 21.826 Std err .938 Median 22.000
Mode 23.000 Std dev 4.499 Variance 20.241
Kurtosis 2.865 S E Kurt .935 Skewness -1.151
S E Skew .481 Range 20.000 Minimum 8.000
Maximum 28.000 Sum 502.000
Valid cases 23 Missing cases 0
-> RELIABILITY VARIABLES=S4561q1 TO S4561q4/
-> STATISTICS = DESCRIPTIVES CORRELATIONS/
-> SUMMARY = CORRELATIONS TOTAL.
R E L I A B I L I T Y A N A L Y S I S - S C A L E (A L L)
1. S4561Q1
2. S4561Q2
3. S4561Q3
4. S4561Q4
MEAN STD DEV CASES
1. S4561Q1 5.8696 .8689 23.0
2. S4561Q2 5.4348 1.6467 23.0
3. S4561Q3 5.9565 1.1862 23.0
4. S4561Q4 4.5652 1.8297 23.0
CORRELATION MATRIX
S4561Q1 S4561Q2 S4561Q3 S4561Q4
S4561Q1 1.0000
S4561Q2 .6768 1.0000
S4561Q3 .7440 .5919 1.0000
S4561Q4 .4488 .3522 .6192 1.0000
# OF CASES = 23.0
INTER-ITEM
CORRELATIONS MEAN MINIMUM MAXIMUM RANGE MAX/MIN VARIANCE
.5721 .3522 .7440 .3917 2.1121 .0194
ITEM-TOTAL STATISTICS
SCALE SCALE CORRECTED
MEAN VARIANCE ITEM- SQUARED ALPHA
IF ITEM IF ITEM TOTAL MULTIPLE IF ITEM
DELETED DELETED CORRELATION CORRELATION DELETED
S4561Q1 15.9565 14.5889 .7378 .6397 .7323
S4561Q2 16.3913 11.1581 .5792 .4757 .7593
S4561Q3 15.8696 12.3004 .7852 .6648 .6690
S4561Q4 17.2609 10.6561 .5221 .3838 .8140
01-Apr-96 SPSS Release 4.0 for Macintosh Page 104
R E L I A B I L I T Y A N A L Y S I S - S C A L E (A L L)
RELIABILITY COEFFICIENTS 4 ITEMS
ALPHA = .7918 STANDARDIZED ITEM ALPHA = .8425