Text categorization topic recognition demographic/gender/age identification.Subjectivity in textual data sentiment analysis polarity/opinion identification and extraction, linguistic analyses of social media behavior.Human computer interaction social media tools navigation and visualization.Trust reputation recommendation systems.Social network analysis communities identification expertise and authority discovery.Ranking/relevance of social media content and users.
Centrality/influence of social media publications and authors.Qualitative and quantitative studies of social media.Analysis of the relationship between social media and mainstream media.Psychological, personality-based and ethnographic studies of social media.Studies of digital humanities (culture, history, arts) using social media.ICWSM-2021 was held virtually from June 8 - 10, with a dedicated program of contributed talks, posters, and demos, and a dedicated day of workshops and tutorials held on June 7th, 2021. The uniqueness of the venue and the quality of submissions have contributed to a rapidly growing conference, and a competitive acceptance rate of approximately 20% for full-length research papers published in the proceedings by the Association for the Advancement of Artificial Intelligence (AAAI). ICWSM, now in its fifteenth year, has become one of the premier venues for computational social science, and previous years of ICWSM have featured papers, posters, and demos that draw upon network science, machine learning, computational linguistics, sociology, communication, and political science. ICWSM is a singularly fitting venue for research that blends social science and computational approaches to answer important and challenging questions about human social behavior through social media while advancing computational tools for vast and unstructured data. This overall theme includes research in new perspectives in social theories, as well as computational algorithms for analyzing social media. The International AAAI Conference on Web and Social Media (ICWSM) is a forum for researchers from multiple disciplines to come together to share knowledge, discuss ideas, exchange information, and learn about cutting-edge research in diverse fields with the common theme of online social media.