Emotion and sentiment in social and expressive media: Introduction to the special issue

This article introduce the Special Issue of the Information Processing and Management International Journal on Emotion and Sentiment in Social and Expressive Media . Selected articles are a valuable and varied representation of approaches facing the challenges of processing the affective information in social and expressive media. The proposals tackle with automatic extraction and classification of the affective information not only in textual, but also in multimedia contents, with a special attention on the exploitation of psychologically grounded models of affect. They cope with a range of interesting tasks, in different domains, also related to art,where the impact of emotions and sentiment analysis has proven important in order to improve the understanding of the social and expressive media data.