This article reports on the ability of observers who are sighted and those with low vision to make time-to-collision (TTC) estimations using video. The TTC estimations made by the observers with low vision were comparable to those made by the sighted observers, and both groups made underestimation errors that were similar to those that were previously reported in the literature.
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References
1.
Americans with Disabilities Act accessibility guidelines (ADAAG) for buildings and facilities (1991, July 26). Federal Register, 56(144), 35605–35691.
2.
ArmstrongJ. D. (1977). Mobility aids and the limitations of technological solutions. New Beacon, 61, 113–115.
3.
CavalloV., & LaurentM. (1988). Visual information and skill level in time-to-collision estimation. Perception, 17, 623–632.
4.
DunkeldJ., & BowerT. G. R. (1980). Infant responses to impending collision. Perception, 9, 549–554.
5.
GallonC., FowkesA., & EdwardsM. (1995). Accidents involving visually impaired people using public transport or walking.London: Transport Research Laboratory.
6.
GibsonJ. J. (1966). The senses considered as perceptual systems.Boston: Houghton Mifflin.
7.
GibsonJ. J. (1979). The ecological approach to visual perception.Boston: Houghton Mifflin.
GrayR., & ThorntonI. M. (2001). Exploring the link between time-to-collision and representational momentum. Perception, 30, 1007–1022.
10.
GroegerJ. A., & BrownI. D. (1988). Motion perception is not direct with indirect viewing systems. In GaleA. G. (Ed.), Vision in vehicles (Vol. 2, pp. 27–34). Amsterdam: North Holland.
11.
JonesT. (2004). An assessment of a new mobility aid for the visually impaired. Unpublished Ph.D. thesis, University of Bristol, Bristol, England.
12.
LeeD. N. (1979). Visuo-motor co-ordination in space-time. In StelmachG. E., & RequinJ. (Eds.), Tutorials in motor behaviour (pp. 281–295). Amsterdam: North Holland.
13.
McLeodR. W., & RossH. E. (1983). Optic flow and cognitive factors in time-to-collision estimates. Perception, 12, 417–423.
14.
McNamaraR., & BanimL. (1996). City access audit: People with vision impairment for the city of Melbourne.Brighton, England: National Centre for Ageing and Sensory Loss.
15.
NorthJ. (2000). Outdoor environments. In SilverstoneB., LangM. A., RosenthalB. P., & FayeE. E. (Eds.), The Lighthouse handbook on vision impairment and vision rehabilitation (pp. 603–617). New York: Oxford University Press.
16.
PetrieH., & JohnsonV. (1995). MoBIC: An aid to increase the mobility of blind and elderly travellers. Proceedings of the Third European Conference for the Advancement of Rehabilitation Technology (ECART3) (pp. 247–249). Lisbon: National Secretariat of Rehabilitation.
17.
Royal National Institute of the Blind (2002). Travellers’ tales—Making journeys safer for blind and partially sighted people.London: Author.
18.
RossH. E., DickinsonD. J., & JuppB. P. (1970). Geographical orientation under water. Human Factors, 12, 13–23.
19.
SchiffW. (1965). Perception of impending collision: A study of visually directed avoidant behaviour. Psychological Monographs: General and Applied, 79(11), 1–26.
20.
SchiffW., & DetwilerM. L. (1979). Information used in judging impending collision. Perception, 8, 647–658.
21.
SteevesJ. K. E., GrayR., SteinbachM. J., & ReganD. (2000). Accuracy of estimating time to collision using only monocular information in unilaterally enucleated observers and monocularly viewing normal controls. Vision Research, 40, 3783–3789.
22.
TielschJ. M. (2000). The epidemiology of vision impairment. In SilverstoneB., LangM. A., RosenthalB. P., & FayeE. E. (Eds.), The Lighthouse handbook on vision impairment and vision rehabilitation (pp. 5–19). New York: Oxford University Press.
23.
TresilianJ. R. (1999). Visually timed action: Time out for “tau”?Trends in Cognitive Sciences, 3, 301–310.
