User Centred Design for adolescents withCerebral Palsy : Designing an eye controlled software to enhance mathematical activities

Abstract: This study aims to find an answer to what prerequisites that needs to betaken into consideration when designing an eye controlled software formathematical activities carried out by children that suffers from cerebralpalsy. A user centred study was conducted at three habilitation centresaround Stockholm. This resulted in a high-fi prototype for columnarcalculation, in which findings from the study were incorporated.These findings included the need to be able to adjust colour, sizeand shape of interface elements, as the target group suffered from visualimpairments. The interface should have a simple and clean design, astoo appealing elements may draw the attention away from the task. Furthermore,it shouldn’t be too childish, despite the fact that the softwarecovers basic mathematics.The tasks should have various kinds of representation, such as readoutinstructions and visualizations. It is also theorized that by designingthe interface to have non-selectable elements, the user doesn’t needworry about clicking on buttons that affects the interface. Thus, thefocus can be on solving the task. The user should be encourage to solvetasks by getting feedback when a task is solved. This feedback shouldonly be given once per task, and should be customizable and optional.