Bracha Shapira

A prototype system was developed to test the applicability of a dualmethod information-filtering model for filtering e-mail messages: content-based filtering and sociological filtering implemented with user stereotypes. This paper reports the main results of experiments that were run to determine the effects of combining the two methods in various ways. A major outcome of the experiments is that the combination of both methods yields better results than using each method individually. The optimal combination of the two filtering methods is stereotype dependent.