Dissatisfaction extraction device, dissatisfaction extraction method, and dissatisfaction extraction program

摘要

From the document written by the user of the evaluation target product, the complaints useful for improving the evaluation target product are extracted. The dissatisfied sentence candidate extraction unit 104 refers to the evaluation expression dictionary 108 from the sentence set stored in the sentence set acquisition unit 101 and evaluates the evaluation expression related to the evaluation object and the evaluation object and the evaluation expression related to the comparison object and the comparison object Extract dissatisfied sentence candidates including. The polarity determination unit 105 determines the degree of polarity of the evaluation expression related to the evaluation object and the evaluation expression related to the comparison object. When the evaluation expression related to the comparison target is an affirmative evaluation expression or a neutral evaluation expression, the dissatisfaction sentence extraction unit 106 determines the difference between the polarity value Pt of the evaluation expression related to the evaluation target and the polarity value Pc of the evaluation expression related to the comparison target ( A sentence in which (Pc−Pt) is equal to or greater than a threshold is determined to be a dissatisfied sentence.