Image Estimaation with Evaluation Expression and Its Application to Attentive Hearing Dialogue System

In this paper, we propose an image estimation method with evaluation expression and its application to attentive hearing dialogue system. The aim of this paper is to encourage and satisfy the desire for conversation of the elderly. In order to promote the desire, there are two important points: estimation of feeling of the elderly from their utterances and creation of sentences considering their feelings. In the proposed system, sentences are created based on the estimation of impression of the words contained in the input sentences. For the impression estimation, several language resources are employed and combined to create new dictionaries: a dictionary containing about 7,000 words expressing appraisal and that containing 200,000 nouns. In the process of sentence creation, the concepts in the method of attentive hearing are reflected to encourage the desire for conversation. We carried out two kinds of experiments to evaluate the proposed system in terms of Grice's axioms and confirmed the effectiveness of the system.