Objective: This study examined the effect of cane tips and cane techniques on drop-off detection with the long cane.
Background: Blind pedestrians depend on a long cane to detect drop-offs. Missing a drop-off may result in falls or collision with moving vehicles in the street. Although cane tips appear to affect a cane user’s ability to detect drop-offs, few experimental studies have examined such effect.
Method: A repeated-measures design with block randomization was used for the study. Participants were 17 adults who were legally blind and had no other disabilities. Participants attempted to detect the drop-offs of varied depths using different cane tips and cane techniques.
Results: Drop-off detection rates were similar between the marshmallow tip (77.0%) and the marshmallow roller tip (79.4%) when both tips were used with the constant contact technique, p = .294. However, participants detected drop-offs at a significantly higher percentage when they used the constant contact technique with the marshmallow roller tip (79.4%) than when they used the two-point touch technique with the marshmallow tip (63.2%), p < .001.
Conclusion: The constant contact technique used with a marshmallow roller tip (perceived as a less advantageous tip) was more effective than the two-point touch technique used with a marshmallow tip (perceived as a more advantageous tip) in detecting drop-offs.
Application: The findings of the study may help cane users and orientation and mobility specialists select appropriate cane techniques and cane tips in accordance with the cane user’s characteristics and the nature of the travel environment.
Ambrose-Zaken, G. ( 2005). Knowledge of and preferences for long cane components: A qualitative and quantitative study. Journal of Visual Impairment & Blindness, 99, 633-645.
2.
Armstrong, J.D. ( 1975). Evaluation of man-machine systems in the mobility of the visually handicapped. In R. M. Picket , & T. J. Triggs (Eds.), Human factors in health care (pp. 331-343). Lexington, MA: Lexington Books.
3.
Blasch, B.B., & De l’Aune, W. (1992). A computer profile of mobility coverage and a safe index. Journal of Visual Impairment & Blindness, 86, 249-254.
4.
Blasch, B.B., LaGrow, S.J., & De l’Aune, W. (1996). Three aspects of coverage provided by the long cane: Object, surface, and foot-placement preview. Journal of Visual Impairment & Blindness, 90, 295-301.
5.
Bongers, R.M., Schellingerhout, R., van Grinsven, R., & Smitsman, A.W. (2002). Variables in the touch technique that influence the safety of cane walkers. Journal of Visual Impairment & Blindness, 96, 516-531.
6.
Chan, T., & Turvey, M.T. ( 1991). Perceiving the vertical distances of surfaces by means of a hand-held probe. Journal of Experimental Psychology: Human Perception and Performance, 17, 347-358.
7.
Cohen, J. ( 1988). Statistical power analysis for the behavioral sciences (2nd ed.). Mahwah, NJ: Erlbaum.
8.
De Bruin, D. ( 1981, June). The constant contact technique. American Association of Workers for the Blind Newsletter, n.p.
9.
Erdfelder, E., Faul, F., & Buchner, A. ( 1996). Gpower: A general power analysis program. Behavior Research Methods, Instruments, & Computers, 28, 1-11.
10.
Fisk, S. ( 1986). Constant-contact technique with a modified tip: A new alternative for long-cane mobility. Journal of Visual Impairment & Blindness, 80, 999-1000.
11.
Fitzpatrick, P., Carello, C., & Turvey, M.T. ( 1994). Eigenvalues of the inertia tensor and exteroception by the muscular sense. Neuroscience, 60, 551-567.
12.
Gescheider, G.A. ( 1997). Psychophysics: The fundamentals (3rd ed.). Mahwah, NJ: Erlbaum.
13.
Gescheider, G.A., Bolanowski, S.J., Verrillo, R.T., Arpajian, D.J., & Ryan, T.F. ( 1990). Vibrotactile intensity discrimination measured by three methods. Journal of the Acoustical Society of America, 87, 330-338.
14.
Hill, E.W., & Ponder, P. ( 1976). Orientation and mobility techniques: Guide for the practitioner . New York, NY: American Foundation for the Blind.
15.
Hoover, R.E. ( 1962). The cane as a travel aid. In P. A. Zahl (Ed.), Blindness: Modern approaches to the unseen environment (pp. 353-365). New York, NY: Hafner.
16.
Kaplan, F.S., Nixon, J.E., Reitz, M., Rindfleish, L., & Tucker, J. ( 1985). Age-related changes in proprioception and sensation of joint position. Acta Orthopaedica, 56, 72-74.
17.
Kim, D., Wall Emerson, R.S., & Curtis, A.B. ( 2009). Drop-off detection with the long cane: Effects of different cane techniques on performance. Journal of Visual Impairment & Blindness, 103, 519-530.
18.
LaGrow, S.J., Blasch, B.B., & De l’Aune, W. (1997). Efficacy of the touch technique for surface and foot-placement preview. Journal of Visual Impairment & Blindness, 91, 47-52.
19.
LaGrow, S.J., Kjeldstad, A., & Lewandowski, E. (1988). The effects of cane-tip design on three aspects of nonvisual travel. Journal of Visual Impairment & Blindness, 82, 13-16.
20.
LaGrow, S.J., & Weessies, M.J. (1994). Orientation and mobility: Techniques for independence. Palmerston North, New Zealand: Dunmore Press.
21.
Leung, M., & Ciocca, V. ( 2004). The effect of vertical tongue loading on position perception of the tongue. Perception & Psychophysics, 66, 1115-1124.
22.
Lillie, C.A. ( 1987). The effects of cane tip design when using the constant contact cane technique (Unpublished master’s thesis). Western Michigan University, Kalamazoo.
23.
McClure, R., Turner, C., Peel, N., Spinks, A., Eakin, E., & Hughes, K. ( 2005). Population-based interventions for the prevention of fall-related injuries in older people. Cochrane Database of Systematic Reviews, 1, Article No. CD004441. doi:10.1002/14651858.CD004441.pub2
24.
Miller, M.E., & Hoover, R.E. ( 1946). Foot travel without sight. Outlook for the Blind, 40, 244-251.
25.
Newman, J. (2008). Physics of the life sciences. New York, NY: Springer Science+Business Media.
26.
Pagano, C.C., & Cabe, P.A. ( 2003). Constancy in dynamic touch: Length perceived by dynamic touch is invariant over changes in media. Ecological Psychology , 15, 1-17.
27.
Pietrowicz, D. (1987). The effect of the marshmallow tip on cane sticking rates on a group of visually impaired veterans in a rural travel setting (Unpublished master’s thesis) . Western Michigan University, Kalamazoo.
28.
Robertson, L.E. (1987). The effects of cane tip design and cane technique on sticking (Unpublished master’s thesis). Western Michigan University, Kalamazoo.
29.
Rodgers, M.D. ( 1991). A human factors analysis of the long cane. Dissertation Abstracts International, 53(02). (UMI No. 746490191)
30.
Rodgers, M.D., & Wall Emerson, R. (2005a). Human factor analysis of long cane design: Weight and length. Journal of Visual Impairment & Blindness, 99, 622-632.
31.
Rodgers, M.D., & Wall Emerson R. (2005b). Materials testing in long cane design: Sensitivity, flexibility, and transmission of vibration. Journal of Visual Impairment & Blindness, 99, 696-706.
32.
Rose, S., & Maffulli, N. ( 1999). Hip fractures. An epidemiological review. Hospital for Joint Diseases Bulletin, 58, 197-201.
33.
Schellingerhout, R., Bongers, R.M., Grinsven, R. van, Smitsman, A.W., & van Galen, G.P. (2001). Improving obstacle detection by redesign of walking canes for blind persons. Ergonomics , 44, 513-526.
34.
Solomon, H.Y., & Turvey, M.T. ( 1988). Haptically perceiving the distances reachable with hand-held objects. Journal of Experimental Psychology: Human Perception and Performance, 14, 404-427.
35.
Solomon, H.Y., Turvey, M.T., & Burton, G. ( 1989). Gravitational and muscular variables in perceiving rod extent by wielding. Ecological Psychology, 1, 265-300.
36.
Tipler, P.A. ( 1982). Physics (2nd ed.). New York, NY: Worth.
37.
Veterans Administration. (1964). Specifications for the long cane (Typhlocane) . Washington, DC: Author.
38.
Wall, R.S., & Ashmead, D.H. ( 2002). Changes in biomechanical features of the two-point touch technique as it is learned. Journal of Visual Impairment & Blindness, 96, 829-841.
39.
Wang, W. ( 1991). The effects of cane-tip design on nonvisual travel in rural areas (Unpublished master’s thesis). Western Michigan University, Kalamazoo.
40.
Wickelgren, W.A. ( 1966). Consolidation and retroactive interference in short-term recognition memory for pitch. Journal of Experimental Psychology , 72, 250-259.
