TY - JOUR T1 - Evaluation of Sentimental Texts Automatically Generated by a Generative Adversarial Network AU - Park, Cheon-Young AU - Choi, Yong-Seok AU - Lee, Kong Joo JO - KIPS Transactions on Software and Data Engineering PY - 2019 DA - 2019/1/30 DO - 10.3745/KTSDE.2019.8.6.257 KW - Generative Adversarial Network (GAN) KW - Data Augmentation KW - Sentimental Text KW - Sentiment Classifier AB - Recently, deep neural network based approaches have shown a good performance for various fields of natural language processing. A huge amount of training data is essential for building a deep neural network model. However, collecting a large size of training data is a costly and time-consuming job. A data augmentation is one of the solutions to this problem. The data augmentation of text data is more difficult than that of image data because texts consist of tokens with discrete values. Generative adversarial networks (GANs) are widely used for image generation. In this work, we generate sentimental texts by using one of the GANs, CS-GAN model that has a discriminator as well as a classifier. We evaluate the usefulness of generated sentimental texts according to various measurements. CS-GAN model not only can generate texts with more diversity but also can improve the performance of its classifier.