Such metrics suitably express both the cognitive load on users and the structural complexity of the application domain. Enjoyability at an early stage of the interaction enhances the user's interest in the application domain and his or her motivation to observe and learn more. Thus, the more transparent and user-friendly the interface, the more useful the system is considered to be. A second relevant remark concerns the role videos should play in hypermedia design. For most users, the mere presence of the video scenes and the quality of their editing strongly affect the overall evaluation of the system.
Video seems to be the key feature in museum information systems.
The paper is clear and concise, and it is well equipped with figures and tables. The Digital Library is published by the Association for Computing Machinery.