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User assistance, as implemented in most commercial computing applications deployed today, has a number of well documented limitations. Speech technology can be used to complement traditional user assistance techniques and mitigate some of these problems. This paper reports the results from a pilot study conducted on a speech-enabled user assistance system,(More)
Adaptations using speech synthesis provide a basic level of access to computer systems for blind users, but current systems pose a number of usability problems. A study was carried out in order to assess the impact of certain issues on the usability of a typical speech adaptation. The results suggest that much work needs to be done on the design of speech(More)
Synthetic speech is widely used to enable blind people to receive output from computer systems. However, speech is slow to use compared with vision and places far higher demands on short-term memow. These problems are particularly apparent when exploring farge data structures such as lists and tables. An experiment was conducted in which subjects were asked(More)
Spatial sound information/cues may enhance the sense of immersiveness in virtual story telling. However, their role within complex, loosely-structured narratives is little understood. This paper describes a virtual heritage project that aims to convey a factual story using interactive virtual environments. Sound was added to the existing project in an(More)
In the special education context of children with autism, the design of educational software needs to focus on their unique learning styles. In this study, results of a survey in Irish Primary Schools, and interviews with tutors, indicate that characteristics of learners with autism need to be more integrated into the design process. An interaction model,(More)
We present an empirical evaluation of innovative interaction techniques in an educational hypermedia system. The techniques investigated include the integration of 3d-interaction and hypertext-functionality, the use of fisheye techniques for the purpose of navigating in textual information and the generation of figure captions which automatically describe(More)