Journal of Rehabilitation Research & Development (JRRD)

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Volume 51 Number 3, 2014
   Pages 467 — 480

Abstract — Effect of dynamic keyboard and word-prediction systems on text input speed in persons with functional tetraplegia

Samuel Pouplin, OT, MSc;1–3* Johanna Robertson, PT, PhD;2–3 Jean-Yves Antoine, PhD;4 Antoine Blanchet, DI;5 Jean Loup Kahloun, Development Engineer;5 Philippe Volle, Director;6 Justine Bouteille, OT;1–3 Frédéric Lofaso, MD, PhD;2–3,7 Djamel Bensmail, MD, PhD1–3

1New Technologies Plate-Forme and 2Physical Medicine and Rehabilitation Department, AP-HP, Raymond Poincaré Teaching Hospital, Garches, France; 3EA 4497 and Technological Innovations Centre (Inserm U 805), Versailles St-Quentin-en-Yvelines University, Garches, France; 4Computer Lab, François Rabelais University, Tours & Lab-STICC, CNRS, Lorient, France; 5In Vienetis Inc, Paris, France; 6IN’TECH INFO, ESIEA, Ivry sur Seine, France; 7Physiology–Functional Testing Ward, AP-HP, Raymond Poincaré Teaching Hospital, Garches, France

Abstract — Information technology plays a very important role in society. People with disabilities are often limited by slow text input speed despite the use of assistive devices. This study aimed to evaluate the effect of a dynamic on-screen keyboard (Custom Virtual Keyboard) and a word-prediction system (Sibylle) on text input speed in participants with functional tetraplegia. Ten participants tested four modes at home (static on-screen keyboard with and without word prediction and dynamic on-screen keyboard with and without word prediction) for 1 mo before choosing one mode and then using it for another month. Initial mean text input speed was around 23 characters per minute with the static keyboard and 12 characters per minute with the dynamic keyboard. The results showed that the dynamic keyboard reduced text input speed by 37% compared with the standard keyboard and that the addition of word prediction had no effect on text input speed. We suggest that current forms of dynamic keyboards and word prediction may not be suitable for increasing text input speed, particularly for subjects who use pointing devices. Future studies should evaluate the optimal ergonomic design of dynamic keyboards and the number and position of words that should be predicted.

Key words: assistive technology, computer, dynamic keyboard, learning, quadriplegia, satisfaction, self-help devices, text input speed, virtual keyboard, word-prediction system.


View HTML ¦ View PDF ¦ Contents Vol. 51, No.3
This article and any supplementary material should be cited as follows:
Pouplin S, Robertson J, Antoine J, Blanchet A, Kahloun JL, Volle P, Bouteille J, Lofaso F, Bensmail D. Effect of dynamic keyboard and word-prediction systems on text input speed in persons with functional tetraplegia. J Rehabil Res Dev. 2014;51(3):467–80.
http://dx.doi.org/10.1682/JRRD.2012.05.0094
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