Conference Proceeding

Just Noticeable Differences for Vehicle Rates of Closure

  • Gregory M Corso (Georgia Institute of Technology, Atlanta, GA)
  • George J Kelling (Georgia Institute of Technology, Atlanta, GA)


The goal for this research was to identify the just noticeable difference (JND) for vehicle rates of closure. In our attempt to identify the JND we used two traditional psychophysical methods. However, these procedures resulted aberrant relationships between rate of closure and percent correct. Both of the traditional procedures used a sequential presentation of a standard animation and a comparison animation. The final method used a change in the rate of closure within the animation. This method provided us with a JND of between 12.9 to 16.1 km/h (8 to 10 mph). Reasons for the aberrant findings using the traditional methods are discussed.

How to Cite:

Corso, G. & Kelling, G., (2007) “Just Noticeable Differences for Vehicle Rates of Closure”, Driving Assessment Conference 4(2007), 133-137. doi:

Rights: Copyright © 2007 the author(s)

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Published on
10 Jul 2007
Peer Reviewed