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D. Regan

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Publications by D. Regan (bibliography)

» 1992 «

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Regan, D., Hamstra, S. and Kaushal, S. (1992): Visual Factors in the Avoidance of Front-to-Rear-End Highway Collisions. In: Proceedings of the Human Factors Society 36th Annual Meeting 1992. pp. 1006-1010.

“Two visual factors in the avoidance of front-to-rear-end collisions are (a) judging time to collision so as to control braking optimally on a moment-to-moment basis, and/or (b) judging one's heading relative to the lead car so as to steer appropriately. It is known that time to contact equals {Theta}/(d{Theta}/dt) and it is also known that the eye is sensitive to {Theta} and, separately, (d{Theta}/dt) ({Theta} is the angular size and (d{Theta}/dt) is the rate of increase of angular size). But whether the eye is sensitive to the ratio ({Theta}/(d{Theta}/dt) and, if so, whether drivers use this information are further questions. We report here that the human visual system does contain neurons sensitive to the ratio {Theta}/(d{Theta}/dt) rather independently of {Theta} and (d{Theta}/dt). It is important that the driver looks directly at the lead vehicle: sensitivity to (d{Theta}/dt) falls off steeply in peripheral view. But, over a wide range, sensitivity to (d{Theta}/dt) is independent of contrast. In addition to the classical disparity-driven system for binocular depth perception, there is a separate binocular system for motion in depth. Precise judgements (0.2 deg) of heading are supported by this stereomotion system, but on the other hand about 20% of the population have stereomotion "blind spots" (i.e. field defects). Monocularly-available informations can also support precise judgements of heading, and field defects seem to be rare. Field studies on flight simulators and telemetry-tracked jet aircraft showed that laboratory measures of sensitivity to (d{Theta}/dt) and to the rate of expansion of the optical flow field predicted intersubject differences in performance on flying tasks that were closely related to the rear-end collision situation.”

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Changes to this page (author)

23 Feb 2010: Enabled abstracts to be shown on D. Regan's author page.
26 Jun 2007: Author was added to the bibliography

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Publication period:1992-1992
Publication count:1
Number of co-authors:2

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D. Regan's 3 most productive colleagues in number of publications:

S. Kaushal:1
S. Hamstra:1

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Number of publications with 3 favourite co-authors:

S. Kaushal:1
S. Hamstra:1

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D. Regan

Publications by D. Regan (bibliography)

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