This report is an archived publication and may contain dated technical, contact, and link information

Federal Highway Administration >
Publications >
Research Publications >
Safety >
Human Factors >
04145 >
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

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

PDF Version (1.52 MB)

PDF files can be viewed with the Acrobat® Reader®

APPENDIX F—ANOVA TABLES FOR POST-DRIVE QUESTIONNAIRE

Table 42. ANOVA summary table for the Likert-type scale on detection.

Statement 1: Detection

Source	DF	SS	MS	F value	P value
*Between*
Age	2	1.4	0.7	0.3	0.7487
Subject/Age	12	29.0	2.4

*Within*
VES	3	17.9	6.0	7.63	0.0004 *
VES by Age	6	5.4	0.9	1.14	0.3585
VES by Subject/Age	36	28.2	0.8
TOTAL	59	81.9

Table 43. ANOVA summary table for the Likert-type scale on recognition.

Statement 2: Recognition

Source	DF	SS	MS	F value	P value
TOTAL	59	82.7
*Between*
Age	2	1.7	0.9	0.42	0.6636
Subject/Age	12	24.5	2.0

*Within*
VES	3	19.0	6.3	7.06	0.0008 *
VES by Age	6	5.2	0.9	0.97	0.4619
VES by Subject/Age	36	32.3	0.9

Table 44. ANOVA summary table for the Likert-type scale on lane-keeping assistance.

Statement 3: Lane-keeping assistance

Source	DF	SS	MS	F value	P value
TOTAL	59	135.7
*Between*
Age	2	35.8	17.9	3.95	0.048 *
Subject/Age	12	54.4	4.5

*Within*
VES	3	6.3	2.1	2.11	0.1158
VES by Age	6	3.6	0.6	0.61	0.7188
VES by Subject/Age	36	35.6	1.0

Table 45. ANOVA summary table for the Likert-type scale on roadway direction.

Statement 4: Roadway direction

Source	DF	SS	MS	F value	P value
TOTAL	59	114.6
*Between*
Age	2	30.8	15.4	5.29	0.0226 *
Subject/Age	12	35.0	2.9

*Within*
VES	3	6.3	2.1	2.01	0.1306
VES by Age	6	4.6	0.8	0.74	0.6244
VES by Subject/Age	36	37.8	1.1

Table 46. ANOVA summary table for the Likert-type scale on visual discomfort.

Statement 5: Visual discomfort

Source	DF	SS	MS	F value	P value
TOTAL	59	163.7
*Between*
Age	2	3.6	1.8	0.21	0.8126
Subject/Age	12	102.3	8.5

*Within*
VES	3	9.5	3.2	2.91	0.0479 *
VES by Age	6	8.9	1.5	1.36	0.2555
VES by Subject/Age	36	39.3	1.1

Table 47. ANOVA summary table for the Likert-type scale on overall safety rating.

Statement 7: Overall safety rating

Source	DF	SS	MS	F value	P value
TOTAL	59	140.9
*Between*
Age	2	3.7	1.9	0.28	0.7598
Subject/Age	12	79.7	6.6

*Within*
VES	3	6.9	2.3	1.75	0.1739
VES by Age	6	3.1	0.5	0.39	0.8822
VES by Subject/Age	36	47.5	1.3

Table 48. ANOVA summary table for the Likert-type scale on overall VES evaluation.

Statement 8: Overall VES evaluation (better than regular)

Source	DF	SS	MS	F value	P value
TOTAL	59	151.7
*Between*
Age	2	6.6	3.3	0.47	0.6374
Subject/Age	12	85.1	7.1

*Within*
VES	3	8.9	3.0	2.29	0.0953
VES by Age	6	4.2	0.7	0.53	0.7795
VES by Subject/Age	36	46.9	1.3

Table of Contents

References

Page Owner: Office of Research, Development, and Technology, Office of Safety, RDT

Scheduled Update: Archive - No Update

Technical Issues: TFHRC.WebMaster@dot.gov

Topics: research, safety

Keywords: research, safety, Detection, Recognition, Night Vision, Visibility Vision Enhancement System, Infrared, Headlamp, Pedestrian, Halogen, Rain

TRT Terms: research, Safety and security, Safety, Transportation safety, Automobile driving at night, Automobile driving in rain, Automobiles--Lighting--Evaluation, Night visibility, Headlamps

Updated: 04/12/2012

United States Department of Transportation - Federal Highway Administration