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Abstract
This paper describes an evaluation methodology designed for the IMSA (Interactive Multimedia System for Auto-medication) system. IMSA stands in the multidisciplinary field of medical informatics and aims at providing a health care Internet tool for the general public. As far as a medical information system is patient-oriented, issues in understanding content and of human v - v computer interface usability are key factors to achieve success. The team developing IMSA concentrated part of its work on designing an evaluation methodology to ensure that the system is user-friendly and responds in a way that can be easily understood by the general public. This methodology is built on a three-tier architecture with the user, the evaluator and a set of medical case descriptions. The testing protocol is based on a user trying to run scenarios related to mild clinical signs on the IMSA prototype under the passive presence of an evaluator.