Development of Human Factors Guidelines for Advanced Traveler Information Systems and Commercial Vehicle Operations: Definition and Prioritization of Research Studies
APPENDIX E: EXPERIMENT 2 RESULTS
SUBJECTIVE RATINGS FIGURES













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ANOVA TABLES
Table 97. Analysis of variance for information cost.
independent variable |
df |
MS |
F |
p |
Age |
1 |
0.61 |
1.41 |
0.242 |
S(Age) |
46 |
0.43 |
|
|
Accuracy |
1 |
0.07 |
0.41 |
0.523 |
Age X Accuracy |
1 |
0.01 |
0.05 |
0.831 |
Accuracy X S(Age) |
46 |
0.16 |
|
|
Repetition |
1 |
0.35 |
3.1 |
0.085 |
Age X Repetition |
1 |
0.13 |
1.15 |
0.289 |
Repetition X S(Age) |
46 |
0.11 |
|
|
Accuracy X Repetition |
1 |
0.78 |
9.65 |
0.003 |
Age X Accuracy X Repetition |
1 |
0.08 |
0.94 |
0.338 |
Accuracy X Repetition X S(Age) |
46 |
0.08 |
|
|
Table 98. Analysis of variance for penalty cost.
independent variable |
df |
MS |
F |
p |
Age |
1 |
44.68 |
4.53 |
0.039 |
S(Age) |
46 |
9.86 |
|
|
Accuracy |
1 |
294.87 |
32.42 |
< 0.001 |
Age X Accuracy |
1 |
96.02 |
10.56 |
0.002 |
Accuracy X S(Age) |
46 |
9.10 |
|
|
Repetition |
1 |
15.97 |
1.51 |
0.225 |
Age X Repetition |
1 |
21.08 |
2.0 |
0.164 |
Repetition X S(Age) |
46 |
10.56 |
|
|
Accuracy X Repetition |
1 |
68.57 |
5.03 |
0.03 |
Age X Accuracy X Repetition |
1 |
12.95 |
0.95 |
0.335 |
Accuracy X Repetition X S(Age) |
46 |
13.63 |
|
|
Table 99. Analysis of variance for convergence.
independent variable |
df |
MS |
F |
p |
Age |
1 |
542.04 |
0.59 |
0.445 |
S(Age) |
46 |
914.28 |
|
|
Accuracy |
1 |
16608.31 |
11.93 |
0.001 |
Age X Accuracy |
1 |
11.46 |
0.01 |
0.928 |
Accuracy X S(Age) |
46 |
1392.69 |
|
|
Repetition |
1 |
241.79 |
0.21 |
0.650 |
Age X Repetition |
1 |
709.33 |
0.61 |
0.438 |
Repetition X S(Age) |
46 |
1157.40 |
|
|
Accuracy X Repetition |
1 |
1885.26 |
2.55 |
0.117 |
Age X Accuracy X Repetition |
1 |
547.63 |
0.74 |
0.394 |
Accuracy X Repetition X S(Age) |
46 |
738.32 |
|
|
Table 100. Analysis of variance for trust in the route guidance system.
independent variable |
df |
MS |
F |
p |
Age |
1 |
1631.30 |
0.69 |
0.409 |
S(Age) |
46 |
2350.03 |
|
|
Accuracy |
1 |
613.20 |
1.73 |
0.195 |
Age X Accuracy |
1 |
390.47 |
1.10 |
0.300 |
Accuracy X S(Age) |
46 |
354.84 |
|
|
Repetition |
1 |
938.95 |
6.21 |
0.016 |
Age X Repetition |
1 |
382.01 |
2.53 |
0.119 |
Repetition X S(Age) |
46 |
151.14 |
|
|
Link Position |
4 |
316.96 |
4.00 |
0.004 |
Age X Link Position |
4 |
58.01 |
0.73 |
0.571 |
Link Position X S(Age) |
184 |
79.20 |
|
|
Accuracy X Repetition |
1 |
2859.76 |
22.51 |
< 0.001 |
Age X Accuracy X Repetition |
1 |
25.11 |
0.20 |
0.659 |
Accuracy X Repetition X S(Age) |
46 |
127.03 |
|
|
Accuracy X Link Position |
4 |
1378.82 |
16.12 |
< 0.001 |
Age X Accuracy X Link Position |
4 |
22.91 |
0.27 |
0.898 |
Accuracy X Link Position X S(Age) |
184 |
85.52 |
|
|
Repetition X Link Position |
4 |
71.10 |
0.92 |
0.452 |
Age X Repetition X Link Position |
4 |
49.12 |
0.64 |
0.637 |
Repetition X Link Position X S(Age) |
184 |
77.10 |
|
|
Accuracy X Repetition X Link Position |
4 |
364.45 |
6.11 |
< 0.001 |
Age X Accuracy X Repetition X Link Position |
4 |
70.81 |
1.19 |
0.318 |
Accuracy X Repetition X Link Position X S(Age) |
184 |
59.65 |
|
|
Table 101. Analysis of variance for trust in the route guidance system:
Purchased link information.
source of variation |
df |
MS |
F |
p |
Linkpurc |
1 |
65.021 |
0.263 |
0.608 |
Age |
1 |
1267.701 |
5.125 |
0.024 |
Linkpurc X Age |
1 |
2228.529 |
9.009 |
0.003 |
Residual |
1260 |
247.380 |
|
|
Total |
1263 |
249.606 |
|
|
Table 102. Analysis of variance for trust in the route guidance system:
Information type.
source of variation |
df |
MS |
F |
p |
Age |
1 |
335.653 |
1.292 |
0.256 |
Type |
3 |
9514.599 |
36.619 |
0.000 |
Age X Type |
3 |
203.231 |
0.782 |
0.504 |
Residual |
624 |
259.825 |
|
|
Total |
631 |
303.454 |
|
|
Table 103. Analysis of variance for self-confidence: Purchased link information.
source of variation |
df |
MS |
F |
p |
Linkpurc |
1 |
509.189 |
1.443 |
0.230 |
Age |
1 |
3993.028 |
11.314 |
0.001 |
Linkpurc X Age |
1 |
9093.660 |
25.767 |
0.000 |
Residual |
1260 |
352.914 |
|
|
Total |
1263 |
362.871 |
|
|
Table 104. Analysis of variance for self-confidence: Information type.
source of variation |
df |
MS |
F |
p |
Age |
1 |
2854.894 |
8.131 |
0.004 |
Type |
3 |
1501.729 |
4.277 |
0.005 |
Age X Type |
3 |
700.298 |
1.995 |
0.114 |
Residual |
624 |
351.103 |
|
|
Total |
631 |
362.160 |
|
|
Table 105. Analysis of variance for traffic expectations:
Purchased link information.
source of variation |
df |
MS |
F |
p |
Linkpurc |
1 |
956.198 |
2.646 |
0.104 |
Age |
1 |
5402.856 |
14.950 |
0.000 |
Linkpurc X Age |
1 |
5963.995 |
16.503 |
0.000 |
Residual |
1260 |
361.394 |
|
|
Total |
1263 |
370.246 |
|
|
Table 106. Analysis of variance for traffic expectations: Information type.
source of variation |
df |
MS |
F |
p |
Age |
1 |
1908.180 |
5.872 |
0.016 |
Type |
3 |
14436.522 |
44.422 |
0.000 |
Age X Type |
3 |
1140.610 |
3.510 |
0.015 |
Residual |
624 |
324.985 |
|
|
Total |
631 |
397.857 |
|
|
Table 107. Analysis of variance for trust minus self–confidence: Purchased link information.
source of variation |
df |
MS |
F |
p |
Linkpurc |
1 |
210.298 |
0.588 |
0.443 |
Age |
1 |
9760.491 |
27.291 |
0.000 |
Linkpurc X Age |
1 |
2318.748 |
6.483 |
0.011 |
Residual |
1260 |
357.648 |
|
|
Total |
1263 |
366.560 |
|
|
Table 108. Analysis of variance for trust minus self-confidence: Information type.
source of variation |
df |
MS |
F |
p |
Age |
1 |
5148.357 |
12.703 |
0.000 |
Type |
3 |
4944.875 |
12.201 |
0.000 |
Age X Type |
3 |
243.330 |
0.600 |
0.615 |
Residual |
624 |
405.299 |
|
|
Total |
631 |
432.619 |
|
|
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FHWA-RD-96-143
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