Abstract: Method of computer-based detection of discrepancy between a user's perception of web sites and an author's intention of these web sites, wherein user interactions are gathered and combined with the content of individual web pages, the combination thereof is clustered topically, and a respective topical distance of the web pages is compared to a structural distance of the web pages, which results from the author's elected arrangement of the web pages to each other, whereby the difference in both distances gives the discrepancy in the user's perception and the author's intention of the web pages, characterized in that at least parts of the text are extracted from the web pages for building keywords, which represent the contents of such web pages.