4. Associated SPSS Outputs
The SPSS ONEWAY procedure produces a one-way analysis of variance. ONEWAY
also allows you to specify contrasts, use multiple comparison tests, and to
test for nonlinear trends.
1. Reading
Trend
Analysis by David Lane
Trend Tests by Craig Wendorf
2. Data Set
ANOVA1 Source: Dr. Wuensch's SPSS-Data Page
The independent variable is the daily dose of a new drug with 5 levels: 0mg, 10mg, 20mg, 30mg, and 40 mg. Note that the independent variable is a quantitative variable.
The dependent variable is a measure of these patients' psychological illness after two months of medication.
Independent-Measures Design:
We have 20 scores in each of five experimental conditions. Different subjects are used for all conditions of the experiment.0 101
0 101
0 101
0 104
0 104
0 105
0 110
0 111
0 111
0 113
0 114
0 79
0 89
0 91
0 94
0 95
0 96
0 99
0 99
0 99
10 100
10 65
10 65
10 67
10 68
10 80
10 81
10 82
10 85
10 87
10 87
10 88
10 88
10 91
10 92
10 94
10 95
10 94
10 96
10 96
20 64
20 75
20 75
20 76
20 77
20 79
20 79
20 80
20 80
20 81
20 81
20 81
20 82
20 83
20 83
20 85
20 87
20 88
20 90
20 96
30 100
30 105
30 108
30 80
30 82
30 85
30 87
30 87
30 87
30 89
30 90
30 90
30 92
30 92
30 92
30 95
30 95
30 97
30 98
30 99
40 101
40 102
40 102
40 105
40 108
40 109
40 112
40 119
40 119
40 123
40 82
40 89
40 92
40 94
40 94
40 95
40 95
40 97
40 98
40 99
3. SPSS Lesson and Interpretations
http://core.ecu.edu/psyc/wuenschk/SPSS/ANOVA1-SPSS.doc by Dr. Wuensch
4. Associated SPSS Outputs
