June 2004
Volume 4, Issue 8
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2004
Visual aimpoint perception during simulated landing
Author Affiliations
  • Stephen Palmisano
    Department of Psychology, University of Wollongong, Australia
  • Nigel W. Hudson
    Department of Psychology, University of Wollongong, Australia
  • Barbara J. Gillam
    School of Psychology, University of New South Wales, Australia
Journal of Vision August 2004, Vol.4, 816. doi:10.1167/4.8.816
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      Stephen Palmisano, Nigel W. Hudson, Barbara J. Gillam; Visual aimpoint perception during simulated landing. Journal of Vision 2004;4(8):816. doi: 10.1167/4.8.816.

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Abstract

Experiments examined the accuracy of passive visual aimpoint perception during a simulated final approach for landing. Displays represented a range of glideslopes (1.5 –15 ) towards a ground plane consisting of either: (i) randomly positioned dots (with or without an explicit horizon at optical infinity); (ii) a runway outline; or (iii) a grid. In a two-alternative forced-choice task, participants judged whether their perceived aimpoint for each display was above/below a probe that appeared at a random vertical position following each display. We found that vertical aimpoint judgments were unacceptably imprecise and consistently biased upwards (towards the horizon) for all moving dot displays, even when they were supplemented with an explicit runway outline. While this bias could be removed by increasing the simulated distance and placing an explicit horizon line at optical infinity, the imprecision of vertical aimpoint judgements was not reduced. Accurate and unbiased aimpoint estimates were only found using grid displays — which provided explicit expansion and additional information about the inclination of the ground plane. While the optic flow information provided by random-dot and runway outline displays did not appear to be sufficient for a pilot to safely land an airplane, the systematic aimpoint errors found in these conditions could explain the common occurrence of short landings in so-called ‘black hole’ situations.

Palmisano, S., Hudson, N. W., Gillam, B. J.(2004). Visual aimpoint perception during simulated landing [Abstract]. Journal of Vision, 4( 8): 816, 816a, http://journalofvision.org/4/8/816/, doi:10.1167/4.8.816. [CrossRef]
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