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S. Kaushal

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Publications by S. Kaushal (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)

13 Feb 2010: Enabled abstracts to be shown on S. Kaushal's author page.
26 Jun 2007: Author was added to the bibliography

Publication statistics

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

Productive colleagues

S. Kaushal's 3 most productive colleagues in number of publications:

S. Hamstra:1
D. Regan:1

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Number of publications with 3 favourite co-authors:

S. Hamstra:1
D. Regan:1

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“ Computer programs emerge as the outcome of complex human processes of cognition, communication and negotiation, which serve to establish the meaningful embedding of the computer system in its intended use context. ”

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S. Kaushal

Publications by S. Kaushal (bibliography)

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