主催: The Japanese Society for Artificial Intelligence
会議名: 2018年度人工知能学会全国大会(第32回)
回次: 32
開催地: 鹿児島県鹿児島市 城山ホテル鹿児島
開催日: 2018/06/05 - 2018/06/08
The huge cost of creating labeled training data is a common problem for supervised learning tasks such as sentiment classification. Recent studies showed that pretraining with unlabeled data via a language model can improve the performance of classification models. In this paper, we take the concept a step further by using a conditional language model, instead of a language model. Specifically, we address a sentiment classification task for a tweet analysis service as a case study and propose a pretraining strategy with unlabeled dialog data (tweet-reply pairs) via an encoder-decoder model. Experimental results show that our strategy can improve the performance of sentiment classifiers and outperform several state-of-the-art strategies including language model pretraining.