Eight authors discuss five questions related to user searching of online catalogs: What user needs can be met by online assistance? Should assistance be tailored to particular groups? Should there be more than one level of assistance? Do users learn through computer-assisted instruction? and Will increased system friendliness eliminate the need…

The SAGRES system is an educational environment built on the Web that facilitates the organization of visits to museums, presenting museum information bases in a way adapted to the user's characteristics (capacities and preferences). The system determines the group of links appropriate to the user(s) and shows them in a resultant HTML page. In…

When students feel that their learning needs are not being met by computer-aided instruction, learning becomes passive, often resulting in boredom, frustration or a dislike for learning with computers. "Button Theory" allows the student to express his feelings and questions to the computer at the touch of a button, thus enhancing control over the…