VELOCITY SENSING---COMPARISON OF FIELD AND LABORATORY METHODS

THE EFFECT IS COMPARED OF VARYING THE SENSORY INPUT (VISUAL, AUDITORY, KINESTHETIC, TACTILE, AND VESTIBULAR CUES) ON THE APPRECIATION OF TRAVELED VELOCITY. A MOVIE TECHNIQUE WAS DEVELOPED TO REMOVE THE EFFECTS OF ACCELERATION AND TO PRESENT CONTROLLED FRONTAL AND PERIPHERAL VISUAL CUES. THE RANGE OF VELOCITIES WAS EXTENDED TO 100 MPH. IT IS CONCLUDED THAT (1) THE REMOVAL OF THE FORCE-SENSE FEEDBACK MECHANISM ACTS TO REDUCE THE RATIO OF THE ESTIMATED TO THE PRESENTED OR ACTUAL RANGE OF VELOCITIES; (2) THERE IS DIRECT VARIATION OF THE ABSOLUTE ERROR WITH VELOCITY AS THE RANGE IS EXTENDED TO INCLUDE HIGH SPEEDS; AND (3) SENSING OF VELOCITY BASED ON PERIPHERAL VISUAL STIMULATION APPEARS TO BE MORE RESISTANT TO EXPERIMENTAL ARTIFACTS, SUCH AS A MONOTONOUS ENVIRONMENT FATIGUE, AND THE BETA EFFECT (APPARENT MOVEMENT PRODUCED BY AN INCREASE OF ILLUMINATION OF PART OF THE FIELD), THAN FRONTAL VISUAL STIMULATION. A METHODOLOGICAL CONFUSION IN PLOTTING VELOCITY SENSING DATA WHEN USING THE METHODS OF ESTIMATION AND PRODUCTION IS POINTED OUT AS INFLUENCING THE DESCRIPTION OF SUCH DATA IN TERMS OF OVER-ESTIMATION AND UNDER-ESTIMATION. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1969/292/292-006.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Highway Safety. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Salvatore, Santo
• Publication Date: 1969

Media Info

• Media Type: Print
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 79-91
• Monograph Title: Drivers and driving
• Serial:
  • Highway Research Record
  • Issue Number: 292
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Detection and identification; Detectors; Drivers; Motion pictures; Reaction time; Velocity; Visual perception
• Uncontrolled Terms: Driver reaction
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00223088
• Record Type: Publication
• Report/Paper Numbers: Paper No 1
• Files: TRIS, TRB
• Created Date: Mar 9 1970 12:00AM