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      Evaluation of an Ambiguous-Keyboard Prototype Scanning-System with Word and Character Disambiguation

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      Proceedings of HCI 2010 (HCI)

      Human Computer Interaction

      6 - 10 September 2010

      Augmentative and Alternative Communications, text entry, ambiguous keyboards, disambiguation, scanning

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          Abstract

          Ambiguous keyboards are common in small-size devices such as mobile phones, but they can be applied to other fields such as Augmentative and Alternative Communications, and specifically addressed to people with severe motor disabilities. This research proposes a novel alternative to assign letters to keys, where letters with similar graphical characteristics are grouped into the same key, leading to families of four, three and two-key simple and easy-to-learn layouts. All layouts have been analyzed for a scanning system that implements a word and a character disambiguation algorithm using only one switch as input device. With the best three-key layout, the text entry speeds predicted were 16.7 wpm using word disambiguation and 10.8 wpm for character disambiguation, with a 0.5 seconds scan period. In an experiment conducted with 6 participants and dynamic scan period, average entry speeds reached 12.2 and 6.3 wpm respectively. The top speeds reached by single participants were 16.9 and 8.3 wpm.

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          Most cited references 8

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          Phrase sets for evaluating text entry techniques

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            Techniques for augmenting scanning communication

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              KSPC (Keystrokes per Character) as a Characteristic of Text Entry Techniques

               I. MacKenzie (2002)
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                Author and article information

                Contributors
                Conference
                September 2010
                September 2010
                : 403-411
                Affiliations
                Universidad Politécnica de Valencia, Departamento de Comunicaciones

                Plaza Ferrandiz-Carbonell s/n, 03801 Alcoy (Spain)
                Article
                10.14236/ewic/HCI2010.47
                © Julio Miró-Borrás et al. Published by BCS Learning and Development Ltd. Proceedings of HCI 2010, University of Abertay, Dundee, UK

                This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

                Proceedings of HCI 2010
                HCI
                24
                University of Abertay, Dundee, UK
                6 - 10 September 2010
                Electronic Workshops in Computing (eWiC)
                Human Computer Interaction
                Product
                Product Information: 1477-9358BCS Learning & Development
                Self URI (journal page): https://ewic.bcs.org/
                Categories
                Electronic Workshops in Computing

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