Moreover, such material cannot be presented visually, but only acoustically or via special output devices for the blind. The selection of options and the preference of alternatives over the default is controlled by the user. The selections are made based on a central user model. Information about users is gathered with initial interviews and by monitoring users' interaction with the system. Pending results on user acceptability, smart cards will also be considered as an input device.
Secondary information is derived with inference rules and stereotypes.
In M. Maybury, ed. Intelligent Multimedia Information Retrieval. An Interface Builder Facilitating Access to Users with Disabilities. Tutorial No. 13 in HCI International 97 Conference.