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Pilot Test of Fatigue Management Technologies - Final Report
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Appendix D-2
U.S. Study Phase 2 results from PVT Performance

PVT Table 1: Descriptive Statistics by Driver, Time of Day, and Condition For PVT Response Variables: Raw Lapses

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 1.00 . 1 0.00 . 17 0.24 0.44 . . . . . . 16 0.06 0.25
32 2 2.50 0.71 1 2.00 . 15 2.27 2.19 2 5.50 3.54 . . . 18 4.33 3.41
33 2 1.00 0.00 1 0.00 . 16 0.50 0.63 1 0.00 . . . . 19 0.37 0.68
34 . . . 1 1.00 . 15 1.13 1.88 . . . . . . 17 7.53 6.93
35 2 1.50 2.12 . . . 18 0.44 0.62 . . . . . . 17 5.53 5.42
36 1 6.00 . . . . 18 3.61 3.84 . . . . . . 18 3.28 2.72
37 . . . . . . 20 0.85 1.04 . . . 1 3.00 . 17 1.65 1.00
38 1 3.00 . . . . 18 4.06 4.22 . . . . . . 18 3.06 2.55
39 8 1.75 2.05 3 0.00 0.00 9 2.11 4.40 9 2.11 2.03 1 0.00 . 8 0.00 0.00
40 7 8.71 5.06 3 0.67 1.15 9 12.67 13.42 8 12.25 5.34 1 18.00 . 10 19.60 10.67
41 5 5.60 8.17 1 2.00 . 13 7.62 8.53 4 16.75 22.54 . . . 8 6.38 10.38
42 8 6.63 4.34 1 1.00 . 10 2.50 3.27 8 7.25 7.85 . . . 8 2.75 1.91
                                     
Sum/Mean 37 3.77   12 0.83   178 3.17   32 7.31   3 7.00   174 4.54  

PVT Table 2: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: Transformed Lapses

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 2.41 . 1 1.00 . 17 1.33 0.62 . . . . . . 16 1.09 0.35
32 2 3.44 0.41 1 3.15 . 15 2.95 1.47 2 4.78 1.48 . . . 18 4.12 1.53
33 2 2.41 0.00 1 1.00 . 16 1.66 0.80 1 1.00 . . . . 19 1.45 0.80
34 . . . 1 2.41 . 15 2.05 1.37 . . . . . . 17 5.20 2.30
35 2 2.37 1.93 . . . 18 1.59 0.78 . . . . . . 17 4.19 2.58
36 1 5.10 . . . . 18 3.53 1.98 . . . . . . 18 3.57 1.53
37 . . . . . . 20 1.95 1.04 . . . 1 3.73 . 17 2.77 0.85
38 1 3.73 . . . . 18 3.82 1.91 . . . . . . 18 3.43 1.53
39 8 2.57 1.50 3 1.00 0.00 9 2.27 2.27 9 2.89 1.42 1 1.00 . 8 1.00 0.00
40 7 5.81 1.88 3 1.72 1.24 9 5.86 4.50 8 7.00 1.50 1 8.60 . 10 8.63 2.57
41 5 4.12 3.00 1 3.15 . 13 4.79 3.16 4 7.02 5.11 . . . 8 4.07 3.47
42 8 5.11 1.64 1 2.41 . 10 3.06 1.64 8 4.62 3.27 . . . 8 3.47 0.98
                                     
Sum/Mean 37 3.71   12 1.98   178 2.90   32 4.55   3 4.44   174 3.58  

PVT Table 3: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: Median Response Time

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 236.00 . 1 247.50 . 17 234.88 7.58 . . . . . . 16 229.53 6.97
32 2 253.50 1.41 1 276.00 . 15 257.73 15.76 2 283.25 11.67 . . . 18 277.92 18.50
33 2 257.50 7.78 1 253.00 . 16 247.50 12.01 1 248.50 . . . . 19 241.97 9.71
34 . . . 1 227.00 . 15 223.47 11.74 . . . . . . 17 270.09 34.16
35 2 290.25 33.59 . . . 18 256.33 19.11 . . . . . . 17 298.79 17.68
36 1 320.00 . . . . 18 252.64 23.22 . . . . . . 18 262.25 24.92
37 . . . . . . 20 227.83 12.64 . . . 1 233.50 . 17 232.82 14.01
38 1 272.00 . . . . 18 252.36 26.74 . . . . . . 18 256.89 17.80
39 8 257.19 12.01 3 214.67 2.31 9 239.39 21.20 9 266.06 20.54 1 209.00 . 8 230.19 10.16
40 7 262.43 16.43 3 218.33 1.04 9 271.39 59.31 8 285.88 21.03 1 327.00 . 10 318.50 33.31
41 5 236.00 34.15 1 231.00 . 13 255.85 50.51 4 315.00 158.47 . . . 8 247.38 51.06
42 8 246.50 29.46 1 202.00 . 10 204.00 11.12 8 257.94 40.41 . . . 8 223.19 18.40
                                     
Sum/Mean 37 263.14   12 233.69   178 243.61   32 276.10   3 256.50   174 257.46  

PVT Table 4: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: Mean 10% Fastest Response Times

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 199.20 . 1 208.90 . 17 198.46 3.79 . . . . . . 16 197.08 5.92
32 2 199.45 9.26 1 209.56 . 15 198.82 10.95 2 211.37 5.61 . . . 18 211.15 10.75
33 2 215.34 3.92 1 214.50 . 16 202.91 9.92 1 208.60 . . . . 19 198.74 7.51
34 . . . 1 173.33 . 15 182.47 7.01 . . . . . . 17 201.25 14.56
35 2 232.78 16.66 . . . 18 212.54 13.66 . . . . . . 17 229.71 14.38
36 1 205.33 . . . . 18 198.64 9.44 . . . . . . 18 205.03 12.64
37 . . . . . . 20 183.58 7.57 . . . 1 181.90 . 17 183.38 5.91
38 1 215.80 . . . . 18 191.60 14.94 . . . . . . 18 197.11 12.54
39 8 198.30 8.45 3 175.90 0.75 9 186.68 14.75 9 202.97 13.55 1 169.30 . 8 186.55 5.76
40 7 192.33 6.88 3 179.39 5.88 9 191.97 19.04 8 200.58 9.61 1 203.80 . 10 197.27 16.02
41 5 172.17 14.77 1 153.60 . 13 170.88 13.11 4 170.33 12.40 . . . 8 166.83 11.69
42 8 185.81 14.13 1 162.20 . 10 164.06 7.12 8 183.59 22.25 . . . 8 160.10 8.59
                                     
Sum/Mean 37 201.65   12 184.67   178 190.22   32 196.24   3 185.00   174 194.52  

PVT Table 5: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: Mean 10% Slowest of Reciprocal Response Times

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 3.04 . 1 2.67 . 17 3.14 0.29 . . . . . . 16 3.33 0.23
32 2 2.38 0.15 1 2.20 . 15 2.36 0.44 2 1.78 0.35 . . . 18 1.97 0.36
33 2 2.42 0.12 1 2.72 . 16 2.62 0.20 1 2.66 . . . . 19 2.80 0.27
34 . . . 1 3.00 . 15 3.03 0.53 . . . . . . 17 1.73 0.64
35 2 2.54 0.74 . . . 18 2.91 0.32 . . . . . . 17 1.88 0.67
36 1 1.72 . . . . 18 2.27 0.48 . . . . . . 18 2.22 0.48
37 . . . . . . 20 2.90 0.35 . . . 1 2.54 . 17 2.62 0.27
38 1 2.16 . . . . 18 2.15 0.60 . . . . . . 18 2.19 0.48
39 8 2.50 0.47 3 3.23 0.14 9 2.74 0.80 9 2.34 0.54 1 3.32 . 8 3.11 0.15
40 7 1.34 0.71 3 3.04 0.43 9 1.59 1.35 8 0.58 0.38 1 0.76 . 10 1.11 0.38
41 5 2.42 1.15 1 2.74 . 13 2.07 1.05 4 1.64 1.11 . . . 8 2.30 1.06
42 8 1.91 0.43 1 3.45 . 10 2.74 0.68 8 1.94 0.63 . . . 8 2.27 0.22
                                     
Sum/Mean 37 2.24   12 2.88   178 2.54   32 1.82   3 2.21   174 2.29  

PVT Table 6: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: Total Response Errors

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 4.00 . 1 0.00 . 17 0.88 1.22 . . . . . . 16 0.50 0.63
32 2 2.50 2.12 1 0.00 . 15 2.93 2.55 2 5.00 1.41 . . . 18 4.89 3.31
33 2 1.00 0.00 1 1.00 . 16 1.38 1.02 1 2.00 . . . . 19 1.32 0.89
34 . . . 1 1.00 . 15 1.73 4.83 . . . . . . 17 2.35 2.21
35 2 0.00 0.00 . . . 18 0.78 1.00 . . . . . . 17 1.35 1.41
36 1 3.00 . . . . 18 2.83 2.18 . . . . . . 18 2.78 1.56
37 . . . . . . 20 0.70 0.86 . . . 1 0.00 . 17 1.18 1.38
38 1 1.00 . . . . 18 1.50 2.04 . . . . . . 18 2.00 2.00
39 8 4.38 2.39 3 6.33 0.58 9 5.67 1.94 9 4.33 2.06 1 3.00 . 8 2.25 1.91
40 7 4.00 2.08 3 2.00 1.00 9 4.44 2.35 8 4.00 1.85 1 4.00 . 10 3.00 1.25
41 5 19.20 19.73 1 16.00 . 13 11.46 6.24 4 19.75 10.18 . . . 8 15.25 4.40
42 8 8.25 5.15 1 20.00 . 10 16.10 9.00 8 16.25 11.20 . . . 8 26.88 10.89
                                     
Sum/Mean 37 4.73   12 5.79   178 4.20   32 8.56   3 2.33   174 5.31  

PVT Table 7: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: PVT Slope of the Reciprocal Response Time Curve

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 -0.021 . 1 0.041 . 17 -0.025 0.034 . . . . . . 16 0.004 0.025
32 2 -0.003 0.069 1 -0.080 . 15 -0.041 0.053 2 0.000 0.007 . . . 18 -0.017 0.037
33 2 -0.005 0.008 1 -0.024 . 16 -0.031 0.033 1 0.025 . . . . 19 -0.008 0.045
34 . . . 1 -0.148 . 15 -0.029 0.042 . . . . . . 17 -0.058 0.050
35 2 -0.026 0.015 . . . 18 -0.022 0.038 . . . . . . 17 -0.035 0.088
36 1 -0.031 . . . . 18 -0.007 0.056 . . . . . . 18 -0.024 0.058
37 . . . . . . 20 -0.028 0.043 . . . 1 -0.101 . 17 -0.050 0.046
38 1 -0.044 . . . . 18 -0.088 0.057 . . . . . . 18 -0.043 0.052
39 8 -0.066 0.033 3 0.006 0.040 9 -0.008 0.050 9 -0.068 0.032 1 0.027 . 8 -0.009 0.039
40 7 -0.050 0.089 3 -0.036 0.020 9 -0.092 0.127 8 -0.109 0.027 1 -0.057 . 10 -0.104 0.034
41 5 -0.046 0.084 1 -0.106 . 13 -0.116 0.087 4 -0.070 0.054 . . . 8 -0.058 0.064
42 8 -0.007 0.085 1 -0.054 . 10 -0.001 0.068 8 -0.057 0.079 . . . 8 0.051 0.097
                                     
Sum/Mean 37 -0.030   12 -0.050   178 -0.041   32 -0.047   3 -0.044   174 -0.029  

PVT Table 8: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: Grand Mean Response Time

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 243.85 . 1 260.41 . 17 242.81 9.85 . . . . . . 16 236.78 9.36
32 2 273.58 4.58 1 293.09 . 15 279.59 26.75 2 313.42 3.32 . . . 18 314.11 39.50
33 2 274.22 7.47 1 263.12 . 16 261.32 13.85 1 263.05 . . . . 19 254.47 12.24
34 . . . 1 233.92 . 15 235.80 16.98 . . . . . . 17 330.29 78.23
35 2 302.53 50.39 . . . 18 264.95 21.19 . . . . . . 17 348.40 80.56
36 1 339.02 . . . . 18 277.39 33.14 . . . . . . 18 288.39 32.41
37 . . . . . . 20 241.38 15.70 . . . 1 248.25 . 17 250.35 15.98
38 1 304.60 . . . . 18 304.26 76.00 . . . . . . 18 285.94 33.56
39 8 275.33 24.43 3 224.59 1.60 9 261.57 46.18 9 290.87 35.71 1 218.88 . 8 239.49 9.78
40 7 373.28 106.78 3 232.99 10.37 9 501.06 352.05 8 380.87 48.02 1 517.73 . 10 603.74 261.95
41 5 280.78 92.22 1 239.74 . 13 305.78 93.90 4 378.67 203.25 . . . 8 290.43 89.38
42 8 287.06 43.90 1 209.39 . 10 227.68 27.42 8 300.84 62.39 . . . 8 250.58 20.68
                                     
Sum/Mean 37 295.42   12 244.66   178 283.63   32 321.29   3 328.29   174 307.75  

PVT Table 9: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: Standard Deviation of Response Times

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 46.22 . 1 49.09 . 17 40.66 15.47 . . . . . . 16 37.19 22.99
32 2 89.27 40.44 1 86.38 . 15 92.71 51.53 2 130.21 53.99 . . . 18 163.80 122.87
33 2 59.94 3.73 1 48.18 . 16 62.25 22.16 1 49.14 . . . . 19 51.08 14.50
34 . . . 1 67.58 . 15 58.16 31.53 . . . . . . 17 206.68 152.75
35 2 93.92 89.53 . . . 18 48.91 24.54 . . . . . . 17 238.13 415.66
36 1 122.11 . . . . 18 94.50 49.05 . . . . . . 18 96.03 35.19
37 . . . . . . 20 66.83 38.94 . . . 1 76.38 . 17 88.48 38.22
38 1 184.82 . . . . 18 276.57 454.24 . . . . . . 18 125.39 80.23
39 8 91.20 67.17 3 40.06 2.76 9 91.85 82.44 9 128.82 108.00 1 39.04 . 8 40.48 2.85
40 7 392.03 302.11 3 61.13 36.75 9 559.90 631.35 8 314.54 100.23 1 691.82 . 10 711.32 426.67
41 5 153.16 138.22 1 80.65 . 13 188.46 135.47 4 243.06 169.53 . . . 8 187.31 168.93
42 8 117.32 38.32 1 47.96 . 10 80.51 35.34 8 128.52 53.20 . . . 8 105.92 28.38
                                     
Sum/Mean 37 135.00   12 60.13   178 138.44   32 165.71   3 269.08   174 170.98  

PVT Table 10: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: Distribution Asymmetry

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 0.170 . 1 0.263 . 17 0.190 0.085 . . . . . . 16 0.197 0.060
32 2 0.234 0.039 1 0.198 . 15 0.223 0.059 2 0.228 0.021 . . . 18 0.230 0.056
33 2 0.280 0.022 1 0.210 . 16 0.218 0.046 1 0.296 . . . . 19 0.244 0.054
34 . . . 1 0.102 . 15 0.197 0.070 . . . . . . 17 0.278 0.059
35 2 0.084 0.100 . . . 18 0.172 0.088 . . . . . . 17 0.202 0.072
36 1 0.156 . . . . 18 0.260 0.042 . . . . . . 18 0.274 0.059
37 . . . . . . 20 0.198 0.063 . . . 1 0.193 . 17 0.199 0.048
38 1 0.176 . . . . 18 0.221 0.090 . . . . . . 18 0.225 0.047
39 8 0.179 0.066 3 0.247 0.062 9 0.187 0.102 9 0.183 0.047 1 0.253 . 8 0.228 0.079
40 7 0.272 0.042 3 0.236 0.012 9 0.328 0.105 8 0.380 0.106 1 0.413 . 10 0.277 0.027
41 5 0.212 0.119 1 0.108 . 13 0.216 0.102 4 0.236 0.066 . . . 8 0.207 0.060
42 8 0.336 0.065 1 0.154 . 10 0.266 0.082 8 0.314 0.085 . . . 8 0.268 0.051
                                     
Sum/Mean 37 0.210   12 0.190   178 0.223   32 0.273   3 0.286   174 0.236  

PVT Table 11: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: No R for 30s

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 0.00 . 1 0.00 . 17 0.00 0.00 . . . . . . 16 0.00 0.00
32 2 0.00 0.00 1 0.00 . 15 0.00 0.00 2 0.00 0.00 . . . 18 0.00 0.00
33 2 0.00 0.00 1 0.00 . 16 0.00 0.00 1 0.00 . . . . 19 0.00 0.00
34 . . . 1 0.00 . 15 0.00 0.00 . . . . . . 17 0.00 0.00
35 2 0.00 0.00 . . . 18 0.00 0.00 . . . . . . 17 0.00 0.00
36 1 0.00 . . . . 18 0.00 0.00 . . . . . . 18 0.00 0.00
37 . . . . . . 20 0.00 0.00 . . . 1 0.00 . 17 0.00 0.00
38 1 0.00 . . . . 18 0.00 0.00 . . . . . . 18 0.00 0.00
39 8 0.00 0.00 3 0.00 0.00 9 0.00 0.00 9 0.00 0.00 1 0.00 . 8 0.00 0.00
40 7 0.00 0.00 3 0.00 0.00 9 0.00 0.00 8 0.00 0.00 1 0.00 . 10 0.00 0.00
41 5 0.00 0.00 1 0.00 . 13 0.00 0.00 4 0.00 0.00 . . . 8 0.00 0.00
42 8 0.00 0.00 1 0.00 . 10 0.00 0.00 8 0.00 0.00 . . . 8 0.00 0.00
                                     
Sum/Mean 37 0.00   12 0.00   178 0.00   32 0.00   3 0.00   174 0.00  

PVT Table 12: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: Post PVT Subjective Sleepiness VAS

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 2.00 . 1 1.00 . 17 2.24 2.02 . . . . . . 16 1.31 0.48
32 2 1.00 1.41 1 0.00 . 15 0.93 2.49 2 7.50 0.71 . . . 18 8.06 3.08
33 2 0.00 0.00 1 1.00 . 16 0.06 0.25 1 8.00 . . . . 19 4.53 3.08
34 . . . 1 1.00 . 15 6.47 1.51 . . . . . . 17 7.71 1.26
35 2 0.00 0.00 . . . 18 0.11 0.32 . . . . . . 17 7.00 4.37
36 1 10.00 . . . . 18 7.00 2.47 . . . . . . 18 7.33 2.06
37 . . . . . . 20 7.25 1.02 . . . 1 8.00 . 17 7.47 1.01
38 1 7.00 . . . . 18 7.72 1.60 . . . . . . 18 6.39 3.65
39 8 0.75 2.12 3 0.00 0.00 9 0.00 0.00 9 0.78 2.33 1 6.00 . 8 0.00 0.00
40 7 3.29 4.27 3 0.67 1.15 9 2.11 3.18 8 6.25 4.10 1 10.00 . 10 6.20 4.57
41 5 1.20 2.68 1 0.00 . 13 1.38 2.63 4 0.00 0.00 . . . 8 0.88 2.47
42 8 8.88 3.18 1 1.00 . 10 3.30 3.86 8 8.88 3.18 . . . 8 5.00 4.47
                                     
Sum/Mean 37 3.41   12 0.58   178 3.21   32 5.23   3 8.00   174 5.16  

PVT Table 13: Descriptive Statistics by Driver, Time of Day, and Condition
For PVT Response Variables: Pre PVT Subjective Sleepiness VAS

  No Feedback Feedback
  Day Evening Night Day Evening Night
Driver N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD N Mean SD
31 1 2.00 . 1 1.00 . 17 2.06 1.98 . . . . . . 16 1.25 0.45
32 2 1.00 1.41 1 0.00 . 15 0.80 2.11 2 5.00 2.83 . . . 18 7.11 2.83
33 2 0.00 0.00 1 1.00 . 16 0.06 0.25 1 7.00 . . . . 19 4.53 2.97
34 . . . 1 2.00 . 15 5.93 1.79 . . . . . . 17 6.88 1.41
35 2 0.00 0.00 . . . 18 0.11 0.32 . . . . . . 17 6.71 4.61
36 1 10.00 . . . . 18 6.56 2.73 . . . . . . 18 6.78 1.73
37 . . . . . . 20 6.80 1.54 . . . 1 6.00 . 17 7.41 0.94
38 1 8.00 . . . . 18 7.39 1.14 . . . . . . 18 6.17 3.47
39 8 1.13 3.18 3 0.00 0.00 9 0.00 0.00 9 0.78 2.33 1 7.00 . 8 0.00 0.00
40 7 3.29 4.19 3 1.00 1.73 9 2.00 3.00 8 6.63 4.17 1 8.00 . 10 6.40 4.45
41 5 2.00 4.47 1 0.00 . 13 1.85 3.60 4 0.00 0.00 . . . 8 1.25 3.54
42 8 8.88 3.18 1 1.00 . 10 3.40 3.81 8 6.63 4.66 . . . 8 4.38 4.66
                                     
Sum/Mean 37 3.63   12 0.75   178 3.08   32 4.34   3 7.00   174 4.90  


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