Universal affective model for Readers’ emotion classification over short texts.

Highlights • A novel universal affective model for classifying social emotions is proposed. • ATF-IDF is developed to enhance the semantic relationships between biterms. • A word-level emotional lexicon is established for background words by using SWAT. • UAM is very effective in detecting emotions in both short texts and long texts. Graphical abstract Abstract As the rapid development of Web 2.0 communities, social media service providers offer users a convenient way to share and create their own contents such as online comments, blogs, microblogs/tweets, etc. Understanding the latent emotions of such short texts from social media via the computational model is an important issue as such a model will help us to identify the social events and make better decisions (e.g., investment in stocking market). However, it is always very challenge to detect emotions from above user-generated contents due to the sparsity problem (e.g., a tweet is a short message). In this article, we propose an universal affective model (UAM) to classify readers’ emotions over unlabeled short texts. Different from conventional text classification model, the UAM structurally consists of topic-level and term-level sub-models, and detects social emotions from the perspective of readers in social media. Through the evaluation on real-world data sets, the experimental results validate the effectiveness of the proposed model in terms of the effectiveness and accuracy. [ABSTRACT FROM AUTHOR]