Abstract
This paper describes a method for classifying feedback documents into two polarities: positive and negative. In this method, we classify reputations into “Object Level Reputations” and “Attribute Level Reputations”. Object level reputations are the reputations concerning the object of the feedback document. Attribute level reputations are the reputations concerning one attribute of the object. Since we asuume that the polarity of the object level reputation corresponds to the polarity of the feedback document, feedback documents are first classified using the object level reputation. The feedback documents that do not contain object level reputations are classified using the attribute level reputations. In addition, this paper proposes a method for reliability evaluation of reputations considering two levels of reputations. In this method, we regard the attribute level reputations that has the opposite polarity of the feedback document as reliable reputations. The experimental results using movie reviews showed that the proposed method could classify feedback documents more correctly than the previous method, and that the proposed measure can be one of the reliability measures for reputations.
