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Publication Number: FHWA-RD-96-143
Date: April 1997

Development of Human Factors Guidelines for Advanced Traveler Information Systems and Commercial Vehicle Operations: Definition and Prioritization of Research Studies

 

APPENDIX C: EXPERIMENT 1 AND 1B RESULTS

 

EXPERIMENT 1 ANOVA TABLES

EXPERIMENT 1B ANOVA TABLES

 

EXPERIMENT 1 ANOVA TABLES

Table 64. Analysis of variance for TRAV1A: Guidance easy to learn.

source of variation df MS F p
Age 1 34.78 18.97 0.000
Gender 1 0.02 0.01 0.912
Age X Gender 1 1.05 0.57 0.450
Subjects 102 1.83    
Video 1 1.89 5.78 0.18
Age X Video 1 0.29 0.89 0.347
Gender X Video 1 0.00 0.00 0.956
Age X Gender X Video 1 0.05 0.14 0.705
Subjects 102 0.33    

 

Table 65. Analysis of variance for TRAV1B: Guidance easy to use.

source of variation df MS F p
Age 1 22.14 16.86 0.000
Gender 1 0.05 0.04 0.851
Age X Gender 1 0.41 0.31 0.578
Subjects 99 1.31    
Video 1 9.54 20.68 0.000
Age X Video 1 0.37 0.80 0.374
Gender X Video 1 2.43 5.26 0.024
Age X Gender X Video 1 0.31 0.67 0.416
Subjects 99 0.46    

 

Table 66. Analysis of variance for TRAV1C: Guidance useful.

source of variation df MS F p
Age 1 10.75 7.71 0.007
Gender 1 0.04 0.03 0.867
Age X Gender 1 0.52 0.38 0.542
Subjects 99 1.39    
Video 1 3.21 7.05 0.009
Age X Video 1 0.00 0.00 0.946
Gender X Video 1 0.39 0.87 0.354
Age X Gender X Video 1 1.47 3.21 0.076
Subjects 99 0.46    

 

Table 67. Analysis of variance for TRAV2A: Route map easy to learn.

source of variation df MS F p
Age 1 14.76 11.19 0.001
Gender 1 0.11 0.09 0.770
Age X Gender 1 0.38 0.29 0.592
Subjects 102 1.32    
Video 1 0.95 2.32 0.131
Age X Video 1 2.10 5.12 0.026
Gender X Video 1 0.31 0.76 0.385
Age X Gender X Video 1 2.15 5.26 0.024
Subjects 102 0.41    

 

Table 68. Analysis of variance for TRAV2B: Map route easy to use.

source of variation df MS F p
Age 1 13.10 8.51 0.004
Gender 1 1.02 0.66 0.417
Age X Gender 1 0.08 0.05 0.816
Subjects 99 1.54    
Video 1 2.20 3.19 0.077
Age X Video 1 2.81 4.07 0.046
Gender X Video 1 0.28 0.41 0.523
Age X Gender X Video 1 0.53 0.76 0.384
Subjects 99 0.69    

 

Table 69. Analysis of variance for TRAV2C: Route map useful.

source of variation df MS F p
Age 1 6.56 4.85 0.030
Gender 1 0.41 0.31 0.582
Age X Gender 1 0.05 0.03 0.853
Subjects 100 1.35    
Video 1 2.27 3.69 0.058
Age X Video 1 4.12 6.68 0.011
Gender X Video 1 0.17 0.27 0.603
Age X Gender X Video 1 4.12 6.68 0.011
Subjects 100 0.62    

 

Table 70. Analysis of variance for TRAV3A: Voice easy to learn.

source of variation df MS F p
Age 1 9.18 5.80 0.018
Gender 1 0.83 0.52 0.471
Age X Gender 1 0.29 0.18 0.670
Subjects 102 1.58    
Video 1 5.19 10.06 0.002
Age X Video 1 0.49 0.95 0.332
Gender X Video 1 0.02 0.04 0.848
Age X Gender X Video 1 0.00 0.00 0.985
Subjects 102 0.52    

 

Table 71. Analysis of variance for TRAV3B: Voice easy to use.

source of variation df MS F p
Age 1 9.15 6.08 0.015
Gender 1 0.66 0.44 0.510
Age X Gender 1 1.59 1.06 0.307
Subjects 100 1.50    
Video 1 6.39 12.00 0.001
Age X Video 1 0.97 1.83 0.179
Gender X Video 1 0.04 0.07 0.785
Age X Gender X Video 1 0.33 0.61 0.435
Subjects 100 0.53    

 

Table 72. Analysis of variance for TRAV3C: Voice useful.

source of variation df MS F p
Age 1 0.12 0.06 0.812
Gender 1 0.32 0.15 0.704
Age X Gender 1 0.02 0.01 0.925
Subjects 100 2.21    
Video 1 10.67 9.30 0.003
Age X Video 1 0.36 0.32 0.575
Gender X Video 1 0.25 0.21 0.644
Age X Gender X Video 1 0.67 0.58 0.448
Subjects 100 1.15    

 

Table 73. Analysis of variance for TRAV4: Routing preference.

source of variation df MS F p
Age 1 0.81 0.19 0.660
Gender 1 2.23 0.54 0.465
Age X Gender 1 0.85 0.21 0.652
Subjects 99 4.16    
Video 1 32.27 39.01 0.000
Age X Video 1 0.34 0.41 0.525
Gender X Video 1 2.45 2.97 0.088
Age X Gender X Video 1 0.12 0.14 0.704
Subjects 99 0.83    

 

Table 74. Analysis of variance for TRAV5A: TravTek easy to learn.

source of variation df MS F p
Age 1 35.18 23.36 0.000
Gender 1 0.02 0.02 0.903
Age X Gender 1 0.19 0.12 0.726
Subjects 102 1.51    
Video 1 0.32 1.38 0.242
Age X Video 1 0.01 0.03 0.869
Gender X Video 1 0.15 0.65 0.421
Age X Gender X Video 1 0.07 0.29 0.594
Subjects 102 0.23    

 

Table 75. Analysis of variance for TRAV5B: TravTek easy to use.

source of variation df MS F p
Age 1 17.71 13.95 0.000
Gender 1 0.65 0.51 0.475
Age X Gender 1 0.12 0.10 0.756
Subjects 100 1.27    
Video 1 2.40 5.35 0.023
Age X Video 1 0.10 0.22 0.643
Gender X Video 1 0.03 0.08 0.783
Age X Gender X Video 1 0.26 0.57 0.451
Subjects 100 0.45    

 

Table 76. Analysis of variance for TRAV5C: TravTek useful.

source of variation df MS F p
Age 1 7.38 4.74 0.032
Gender 1 0.71 0.45 0.502
Age X Gender 1 0.56 0.36 0.550
Subjects 100 1.56    
Video 1 0.00 0.01 0.923
Age X Video 1 0.08 0.21 0.650
Gender X Video 1 0.00 0.00 0.991
Age X Gender X Video 1 0.00 0.00 0.977
Subjects 100 0.39    

 

Table 77. Analysis of variance for TRAV6A: At home daily driving.

source of variation df MS F p
Age 1 0.04 0.10 0.756
Gender 1 0.48 1.20 0.276
Age X Gender 1 0.00 0.00 0.990
Subjects 91 0.40    
Video 1 0.13 1.38 0.242
Age X Video 1 0.00 0.00 0.967
Gender X Video 1 0.13 1.38 0.242
Age X Gender X Video 1 0.00 0.00 0.967
Subjects 91 0.09    

 

Table 78. Analysis of variance for TRAV6B: Out-of-town vacation driving.

source of variation df MS F p
Age 1 0.01 0.22 0.638
Gender 1 0.00 0.02 0.900
Age X Gender 1 0.02 0.48 0.492
Subjects 97 0.05    
Video 1 0.00 0.15 0.700
Age X Video 1 0.02 2.06 0.154
Gender X Video 1 0.02 2.06 0.154
Age X Gender X Video 1 0.00 0.15 0.700
Subjects 97 0.01    

 

Table 79. Analysis of variance for TRAV6C: Out-of-town business trips.

source of variation df MS F p
Age 1 0.20 3.02 0.085
Gender 1 0.02 0.31 0.581
Age X Gender 1 0.01 0.10 0.755
Subjects 95 0.07    
Video 1 0.04 3.57 0.062
Age X Video 1 0.04 3.57 0.062
Gender X Video 1 0.00 0.01 0.917
Age X Gender X Video 1 0.00 0.01 0.917
Subjects 95 0.01    

 

Table 80. Analysis of variance for TRAV7: Willing to pay for TravTek.

source of variation df MS F p
Age 1 828675.47 0.94 0.336
Gender 1 316320.66 0.36 0.551
Age X Gender 1 88385.67 0.10 0.753
Subjects 94 884687.99    
Video 1 25815.68 0.80 0.373
Age X Video 1 69187.12 2.15 0.146
Gender X Video 1 36573.92 1.13 0.290
Age X Gender X Video 1 12083.63 0.37 0.542
Subjects 94 32245.92    

 

Table 81. Analysis of variance for TRAV8A: Energy conservation.

source of variation df MS F p
Age 1 0.89 0.53 0.467
Gender 1 1.74 1.05 0.309
Age X Gender 1 1.06 0.64 0.427
Subjects 96 1.66    
Video 1 0.98 3.18 0.078
Age X Video 1 0.40 1.31 0.255
Gender X Video 1 1.82 5.93 0.017
Age X Gender X Video 1 0.99 3.22 0.076
Subjects 96 0.31    

 

Table 82. Analysis of variance for TRAV8B: Environmental quality.

source of variation df MS F p
Age 1 0.08 0.04 0.842
Gender 1 2.38 1.17 0.282
Age X Gender 1 2.91 1.43 0.234
Subjects 96 2.04    
Video 1 0.64 2.81 0.097
Age X Video 1 0.01 0.03 0.873
Gender X Video 1 0.21 0.93 0.338
Age X Gender X Video 1 0.39 1.72 0.193
Subjects 96 0.23    

 

Table 83. Analysis of variance for TRAV8C: Highway/traffic safety.

source of variation df MS F p
Age 1 2.78 1.45 0.231
Gender 1 0.05 0.02 0.875
Age X Gender 1 4.53 2.37 0.127
Subjects 96 1.91    
Video 1 0.07 0.23 0.633
Age X Video 1 0.21 0.63 0.428
Gender X Video 1 0.07 0.23 0.633
Age X Gender X Video 1 0.21 0.63 0.428
Subjects 96 0.33    

 

Table 84. Analysis of variance for TRAV8D: Relief of highway congestion.

source of variation df MS F p
Age 1 0.01 0.01 0.937
Gender 1 0.00 0.00 0.985
Age X Gender 1 2.16 1.20 0.277
Subjects 96 1.81    
Video 1 0.55 1.89 0.173
Age X Video 1 0.00 0.00 0.975
Gender X Video 1 0.10 0.36 0.551
Age X Gender X Video 1 0.00 0.01 0.942
Subjects 96 0.29    

 

Table 85. Analysis of variance for overall TravTek system capabilities.

source of variation df MS F p
Age 1 10581.91 23.51 0.000
Gender 1 1348.51 3.00 0.086
Age X Gender 1 817.74 1.82 0.181
Subjects 105 450.05    
Video 1 21819.59 166.65 0.000
Age X Video 1 1112.44 8.50 0.004
Gender X Video 1 173.32 1.32 0.253
Age X Gender X Video 1 0.22 0.00 0.967
Subjects 105 130.93  

 

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EXPERIMENT 1B ANOVA TABLES

Table 86. Analysis of covariance for CGTEST 1A.

source of variation df MS F p
Covariates 1 0.458 0.447 0.505
Type 1 0.458 0.447 0.505
Main Effects 2 4.925 4.801 0.010
Age 1 9.322 9.089 0.003
Gender 1 0.626 0.610 0.436
2-way Interactions 1 0.025 0.024 0.877
Age X Gender 1 0.025 0.024 0.877
Explained 4 2.583 2.519 0.045
Residual 122 1.026    
Total 126 1.075    

 

Table 87. Analysis of covariance for CGTEST 1B.

source of variation df MS F p
Covariates 1 0.806 0.828 0.365
Type 1 0.806 0.828 0.365
Main Effects 2 5.560 5.714 0.004
Age 1 10.647 10.942 0.001
Gender 1 0.706 0.726 0.396
2-way Interactions 1 0.078 0.080 0.778
Age X Gender 1 0.078 0.080 0.778
Explained 4 3.001 3.084 0.019
Residual 120 0.973    
Total 124 1.038    

 

Table 88. Analysis of covariance for CGTEST 1C.

source of variation df MS F p
Covariates 1 1.141 1.334 0.250
Type 1 1.141 1.334 0.250
Main Effects 2 5.488 6.419 0.002
Age 1 9.769 11.425 0.001
Gender 1 1.450 1.696 0.195
2-way Interactions 1 0.137 0.160 0.690
Age X Gender 1 0.137 0.160 0.690
Explained 4 3.064 3.583 0.008
Residual 121 0.855    
Total 125 0.926    

 

Table 89. Analysis of covariance for CGTEST 2A.

source of variation df MS F p
Covariates 1 0.013 0.011 0.915
Type 1 0.013 0.011 0.915
Main Effects 2 15.595 13.663 0.000
Age 1 31.114 27.260 0.000
Gender 1 0.191 0.167 0.683
2-way Interactions 1 0.756 0.663 0.417
Age X Gender 1 0.756 0.663 0.417
Explained 4 7.990 7.000 0.000
Residual 120 1.141    
Total 124 1.362    

 

Table 90. Analysis of covariance for CGTEST 2B.

source of variation df MS F p
Covariates 1 0.378 0.331 0.566
Type 1 0.378 0.331 0.566
Main Effects 2 12.761 11.165 0.000
Age 1 24.431 21.376 0.000
Gender 1 0.598 0.523 0.471
2-way Interactions 1 0.163 0.143 0.706
Age X Gender 1 0.163 0.143 0.706
Explained 4 6.516 5.701 0.000
Residual 118 1.143    
Total 122 1.319    

 

Table 91. Analysis of covariance for CGTEST 2C.

source of variation df MS F p
Covariates 1 1.610 1.536 0.218
Type 1 1.610 1.536 0.218
Main Effects 2 12.499 11.928 0.000
Age 1 24.981 23.839 0.000
Gender 1 0.006 0.006 0.940
2-way Interactions 1 0.444 0.423 0.517
Age X Gender 1 0.444 0.423 0.517
Explained 4 6.763 6.454 0.000
Residual 120 1.048    
Total 124 1.232    

 

Table 92. Analysis of covariance for CGTEST3.

source of variation df MS F p
Covariates 1 1.380 0.578 0.449
Type 1 1.380 0.578 0.449
Main Effects 2 1.811 0.758 0.471
Age 1 2.572 1.077 0.301
Gender 1 1.054 0.441 0.508
2-way Interactions 1 0.093 0.039 0.844
Age X Gender 1 0.093 0.039 0.844
Explained 4 1.274 0.533 0.712
Residual 117 2.388    
Total 121 2.351    

 

Table 93. Analysis of covariance for CGTEST 4A.

source of variation df MS F p
Covariates 1 4.632 4.533 0.035
Type 1 4.632 4.533 0.035
Main Effects 2 6.578 6.439 0.002
Age 1 11.691 11.442 0.001
Gender 1 1.220 1.194 0.277
2-way Interactions 1 0.298 0.291 0.590
Age X Gender 1 0.298 0.291 0.590
Explained 4 4.522 4.425 0.002
Residual 118 1.022    
Total 122 1.136    

 

Table 94. Analysis of covariance for CGTEST 4B.

source of variation df MS F p
Covariates 1 3.272 3.326 0.071
Type 1 3.272 3.326 0.071
Main Effects 2 6.538 6.645 0.002
Age 1 11.044 11.225 0.001
Gender 1 1.517 1.542 0.217
2-way Interactions 1 0.499 0.507 0.478
Age X Gender 1 0.499 0.507 0.478
Explained 4 4.212 4.281 0.003
Residual 116 0.984    
Total 120 1.091    

 

Table 95. Analysis of covariance for CGTEST 4C.

source of variation df MS F p
Covariates 1 2.232 2.021 0.158
Type 1 2.232 2.021 0.158
Main Effects 2 2.445 2.214 0.114
Age 1 3.180 2.879 0.092
Gender 1 1.508 1.366 0.245
2–way Interactions 1 1.275 1.155 0.285
Age X Gender 1 1.275 1.155 0.285
Explained 4 2.099 1.901 0.115
Residual 117 1.104    
Total 121 1.137    

 

Table 96. Analysis of covariance for overall CityGuide system capabilities.

source of variation df MS F p
Covariates 1 43.251 0.582 0.447
Type 1 43.251 0.582 0.447
Main Effects 2 1215.865 16.374 0.000
Age 1 2235.330 30.103 0.000
Gender 1 169.047 2.277 0.134
2-way Interactions 1 87.178 1.174 0.281
Age X Gender 1 87.178 1.174 0.281
Explained 4 640.540 8.626 0.000
Residual 123 74.255    
Total 127 92.091    

 

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