Modelling User Interfaces for Special Needs
نویسندگان
چکیده
Computers offer valuable assistance to people with physical disabilities. However designing human-computer interfaces for these users is complicated. The range of abilities is more diverse than for able-bodied users, which makes analytical modelling harder. Practical user trials are also difficult and time consuming. We are developing a simulator to help with the design and evaluation of assistive interfaces. It can predict the likely interaction patterns when undertaking a task using a variety of input devices, and estimate the time to complete the task in the presence of different disabilities and for different levels of skill. The simulator is developed according to the concept of Model Human Processor. It consists of a Perception model, a Cognitive model and a Motor-Behaviour Model. In this paper, we have discussed the modelling of visual impairments in the perception model of our simulator. We describe the functions used to model different visual impairments and present demonstrations of their execution.
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