The effect of training on the use of binocular depth cues in low hover depth estimation. Hartle, B., Allison, R. S., Irving, E. L., & Wilcox, L. M. Technical Report PWGSC Contract Number: W7714-145967, CIMVHR Contract Report, 2017. abstract bibtex While there is a long history of research in the contribution of binocular vision and stereoscopic depth perception to flight-based tasks, there is no consensus on its operational relevance. Evidence of such operational relevance is required to determine whether stereoscopic vision should be a requirement for Canadian Air Forces (CAF) aircrew, or if and when waivers can safely be permitted. In the experiments reported herein we examined the contribution of binocular vision to a simulated low hover helicopter flight task in which observers were asked to judge to relative distance between a virtual helicopter skid and the ground plane. Four terrain types were used, and observers were asked to make relative depth judgements monocularly and binocularly. In the first study a group of naı̈ve observers was tested, and in the second experiment we tested a group of experienced aircrew. Our results show that the presence of stereopsis improves the accuracy of relative altitude judgements for low altitudes (below 5 feet) that are typical of low hover flight operations. Under monocular viewing conditions depth judgements were significantly less accurate. This pattern of results was seen in both experiments, with naı̈ve undergraduate and trained aircrew. However, we found that the depth estimates of aircrew were more accurate than those of naı̈ve observers under monocular viewing conditions, a result that may reflect situation-specific training during operational maneuvers. From an operational perspective, these results highlight the potential importance of binocular vision in performing low-hover tasks, and the impact of training on the use of specific depth cues.
@techreport{Hartle:2017pb,
abstract = {While there is a long history of research in the contribution of binocular vision and stereoscopic depth perception to flight-based tasks, there is no consensus on its operational relevance. Evidence of such operational relevance is required to determine whether stereoscopic vision should be a requirement for Canadian Air Forces (CAF) aircrew, or if and when waivers can safely be permitted. In the experiments reported herein we examined the contribution of binocular vision to a simulated low hover helicopter flight task in which observers were asked to judge to relative distance between a virtual helicopter skid and the ground plane. Four terrain types were used, and observers were asked to make relative depth judgements monocularly and binocularly. In the first study a group of na{\"\i}ve observers was tested, and in the second experiment we tested a group of experienced aircrew. Our results show that the presence of stereopsis improves the accuracy of relative altitude judgements for low altitudes (below 5 feet) that are typical of low hover flight operations. Under monocular viewing conditions depth judgements were significantly less accurate. This pattern of results was seen in both experiments, with na{\"\i}ve undergraduate and trained aircrew. However, we found that the depth estimates of aircrew were more accurate than those of na{\"\i}ve observers under monocular viewing conditions, a result that may reflect situation-specific training during operational maneuvers. From an operational perspective, these results highlight the potential importance of binocular vision in performing low-hover tasks, and the impact of training on the use of specific depth cues. },
author = {Hartle, Brittney and Allison, Robert S. and Irving, Elizabeth L. and Wilcox, Laurie M.},
date-added = {2019-03-08 16:43:56 -0500},
date-modified = {2019-03-08 16:51:24 -0500},
institution = {CIMVHR Contract Report},
keywords = {Stereopsis},
number = {PWGSC Contract Number: W7714-145967},
title = {The effect of training on the use of binocular depth cues in low hover depth estimation},
year = {2017}}
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In the experiments reported herein we examined the contribution of binocular vision to a simulated low hover helicopter flight task in which observers were asked to judge to relative distance between a virtual helicopter skid and the ground plane. Four terrain types were used, and observers were asked to make relative depth judgements monocularly and binocularly. In the first study a group of naı̈ve observers was tested, and in the second experiment we tested a group of experienced aircrew. Our results show that the presence of stereopsis improves the accuracy of relative altitude judgements for low altitudes (below 5 feet) that are typical of low hover flight operations. Under monocular viewing conditions depth judgements were significantly less accurate. This pattern of results was seen in both experiments, with naı̈ve undergraduate and trained aircrew. However, we found that the depth estimates of aircrew were more accurate than those of naı̈ve observers under monocular viewing conditions, a result that may reflect situation-specific training during operational maneuvers. From an operational perspective, these results highlight the potential importance of binocular vision in performing low-hover tasks, and the impact of training on the use of specific depth cues. 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