This M. A. Thesis deals with the development of adaptive questionnaires for the user-centered evaluation of website usability and an appropriate web application for this purpose. In this matter, a classification scheme for six various website contexts is generated: E-Commerce, Entertainment, Social Software, Information, Homepages (organizational/personal) and E-Learning. For each category, specific usability criteria based on recent literature are identified. These will be the groundwork for the development of category-based 5-level Likert scale items of which the later questionnaires will be composed. The questions will be tested and evaluated by usability-experts and students to ensure their quality and usefulness. After that, a final test with end-users is done using the complete question set of each category to evaluate a corresponding website followed by the analysis of the results. In a final step, a prototype for the web application is developed which will build the basis for the upcoming implementation
