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Publication Number: FHWA-HRT-04-145
Date: December 2005

Enhanced Night Visibility Series, Volume XIV: Phase III—Study 2: Comparison of Near Infrared, Far Infrared, and Halogen Headlamps on Object Detection in Nighttime Rain

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APPENDIX I—RESULTS ANOVA TABLES

Table 15. ANOVA table for discomfort glare results.
Source DF SS MS F Value P Value  
ADJUSTED TOTALS 299 1302.9       
Between
Age 2 42.5 21.2 0.92 0.4112  
Participant (Age) 27 624.3 23.1     
 
Within
VES 4 143.6 35.9 14.36 <.0001 *
VES by Age 8 32.9 4.1 1.65 0.1199  
VES by Participant (Age) 108 270.0 2.5     
 
Adaptation 1 0.6 0.6 0.22 0.6466  
Adaptation by Age 2 3.2 1.6 0.61 0.5496  
Adaptation by Participant (Age) 27 70.7 2.6     
 
VES by Adaptation 4 0.8 0.2 0.19 0.9424  
VES by Adaptation by Age 8 8.0 1.0 1.02 0.4254  
VES by Adaptation by Participant (Age) 108 106.2 1.0     


Table 16. ANOVA table for the objective measurement of disability glare with detection distances.
Source DF SS MS F Value P Value  
ADJUSTED TOTALS 598 16036520.3       
Between
Age 2 1768349.8 884174.9 15.92 <.0001 *
Participant (Age) 27 1499180.6 55525.2     
 
Within
VES 4 1541883.0 385470.7 26.89 <.0001 *
VES by Age 8 175486.4 21935.8 1.53 0.155  
VES by Participant (Age) 108 1547940.8 14332.8     
 
Adaptation 1 8474.2 8474.2 0.66 0.4235  
Adaptation by Age 2 48880.7 24440.3 1.91 0.1683  
Adaptation by Participant (Age) 27 346393.3 12829.4     
 
Pedestrian 1 4864076.3 4864076.3 86.11 <.0001 *
Pedestrian by Age 2 47114.7 23557.4 0.42 0.6632  
Pedestrian by Participant (Age) 27 1525224.5 56489.8     
 
VES by Adaptation 4 4099.3 1024.8 0.17 0.9524  
VES by Adaptation by Age 8 39558.4 4944.8 0.83 0.5794  
VES by Adaptation by Participant (Age) 108 644631.6 5968.8     
 
Pedestrian by VES 4 268031.5 67007.9 10.18 <.0001 *
Pedestrian by VES by Age 8 24537.8 3067.2 0.47 0.8776  
Pedestrian by VES by Participant (Age) 108 710820.4 6581.7     
 
Pedestrian by Adaptation 1 16062.1 16062.1 2.66 0.1143 *
Pedestrian by Adaptation by Age 2 18858.3 9429.1 1.56 0.2278  
Pedestrian by Adaptation by Participant (Age) 27 162826.8 6030.6     
 
Pedestrian by VES by Adaptation 4 13723.3 3430.8 0.55 0.7011  
Pedestrian by VES by Adaptation by Age 8 16110.7 2013.8 0.32 0.9563  
Pedestrian VES by Adaptation by Participant (Age) 107 670372.6 6265.2     


Table 17. ANOVA table for the objective measurement of driver’s eye illuminance.
Source DF SS MS F Value P Value  
ADJUSTED TOTALS 599 1610.72       
Between
Age 2 103.27 51.64 11.83 0.0002 *
Participant (Age) 27 117.85 4.36     
 
Within
VES 4 187.68 46.92 16.26 <.0001 *
VES by Age 8 131.67 16.46 5.7 <.0001 *
VES by Participant (Age) 108 311.64 2.89     
 
Pedestrian 1 87.62 87.62 39.24 <.0001 *
Pedestrian by Age 2 26.79 13.40 6 0.007 *
Pedestrian by Participant (Age) 27 60.29 2.23     
 
Pedestrian by VES 4 81.59 20.40 12.4 <.0001 *
Pedestrian by VES by Age 8 101.92 12.74 7.75 <.0001 *
Pedestrian by VES by Participant (Age) 108 177.58 1.64     
 
Adaptation 1 0.20 0.20 0.39 0.5355 
Adaptation by Age 2 0.15 0.08 0.15 0.8647 
Adaptation by Participant (Age) 27 14.00 0.52     
 
VES by Adaptation 4 1.34 0.34 0.34 0.848  
VES by Adaptation by Age 8 2.07 0.26 0.26 0.976  
VES by Adaptation by Participant (Age) 108 105.66 0.98     
 
Pedestrian by Adaptation 1 0.06 0.06 0.13 0.7231  
Pedestrian by Adaptation by Age 2 0.30 0.15 0.3 0.7428  
Pedestrian by Adaptation by Participant (Age) 27 13.54 0.50     
 
Pedestrian by VES by Adaptation 4 2.82 0.71 0.98 0.4196  
Pedestrian by VES by Adaptation by Age 8 5.27 0.66 0.92 0.5038  
Pedestrian VES by Adaptation by Participant (Age) 108 77.40 0.72     

 

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