Design and evaluation of an adaptive virtual guide for Web applications

Most applications accessible through theWeb suffer from a noticeable lack of support for adapting to the different information needs that different users may have regarding a certain topic. However, completely automatic adaptive support can still be confusing for users who may not understand the reasons for the dynamic change in the behaviour of an application. In this paper, we present a possible solution to provide adaptive support that does not disorient the user. The solution integrates a virtual January 18, assistant that is able to provide adaptive support in an adaptable application.We discuss an example of the application of this approach involving the support ofWeb visits to virtual museums.We then present the results of an empirical usability test of such an application.