Text Entry in the E-Commerce Age: Two Proposals for the Severely Handicapped

People with severe motor disabilities have extreme access difficulties with all kinds of web services especially when they want not only to surf the web, but also write some text, e.g., to participate in an e-activity. Several problems arise when using traditional scanning systems, such as the low t...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Miró-Borrás,Julio, Bernabeu-Soler,Pablo
Lenguaje:English
Publicado: Universidad de Talca 2009
Materias:
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-18762009000100009
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
Descripción
Sumario:People with severe motor disabilities have extreme access difficulties with all kinds of web services especially when they want not only to surf the web, but also write some text, e.g., to participate in an e-activity. Several problems arise when using traditional scanning systems, such as the low text entry rate, the time consuming task of learning the sean matrix layout, or simply, the poor visibility of the web page due to the large surface needed to display the complete sean matrix on the screen. We propose a reduced virtual keyboard based on scanning with only one switch as input device. The sean matrix consists of only three cells, so ambiguity is present due to the assignment of 26 characters to the three keys. Word-level and character-level disambiguation modes are explored using a mathematical model, and the text entry rates for an expert user were 15.9 and 10.3 words per minute respectively, using a sean period of 0.5 seconds. This keyboard could be embedded into a web page using a Java applet, JavaScript code or a Flash application, or be programmed as an independent application.