POLARITY ESTIMATION SYSTEM, INFORMATION DELIVERING SYSTEM, POLARITY ESTIMATION METHOD, POLARITY ESTIMATION PROGRAM, AND EVALUATION POLARITY ESTIMATION PROGRAM

摘要

The evaluation polarity for reputation information with an unknown evaluation polarity can be estimated with use of reputation information with a known evaluation polarity. This polarity estimation system estimates an evaluation polarity indicating whether reputation information is positive or negative. The system comprises a reputation information storage unit for pre-storing reputation information with a known evaluation polarity, and a polarity estimation means for estimating the evaluation polarity of reputation information with an unknown evaluation polarity according to the reputation information with the known evaluation polarity that is pre-stored in the reputation information storage unit.