Koester Performance Research (KPR), works to enhance computer access for people with disabilities, with a particular emphasis on increasing access to people who are not well-served by a typical keyboard and mouse. The company's research expertise includes usability and effectiveness research, to assess how well a particular technology is working for its users, and user performance modeling, to help improve the "fitâ between a user and technology. The firm also systematically analyzes alternative input methods, such as on-screen keyboards, single-switch scanning, and word prediction, in order to improve their efficiency. The firm designs and builds software based on this line of research
