It can be determined by both the user satisfaction degree and his behaviour and by the user interface. The evaluation protocol Evaluation should form an integral part of the design process of any new technical aid for disabled persons. In this framework, we intend to study man-machine interaction acts for blind users during several Internet accessing tasks. A set of exercises to realise with different browsers was defined. V 3.01 running also with the screen reader Jaws.
Blind users have to carry out exercises and to answer to a questionnaire.
The interview schedule used was elaborated in an iterative process, with several draft versions of exercises which were driven on a number of blind interviewees. So a short presentation of the browsers tested will be made to inexperienced users. The same goes for the screen reader if the user does not use it usually. After a preliminary questionnaire concerning personal information and general use of the telematic tools, the users have to realise seven exercises with each browser. Textual descriptions can be joined to images .