Empowering machine learning models with contextual knowledge for enhancing the detection of eating disorders in social media posts

Semantic web

article

José Alberto Benítez-Andrades¹  María Teresa García-Ordás²  Mayra Russo³  Ahmad Sakor³  Luis Daniel Fernandes Rotger⁴  Maria-Esther Vidal³ 

[1] SALBIS Research Group, Department of Electric, Systems and Automatics Engineering, Universidad de León;SECOMUCI Research Group, Escuela de Ingenierías Industrial e Informática, Universidad de León;Leibniz University of Hannover and L3S Research Center and TIB Leibniz Information Centre for Science and Technology;Bakken and Baeck GmbH

关键词: Name entity linking;    deep learning;    natural language processing;    health data;    knowledge graphs;    Wikidata;   

DOI  :  10.3233/SW-223269

来源: IOS Press

【 摘 要 】

Social networks have become information dissemination channels, where announcements are posted frequently; they also serve as frameworks for debates in various areas (e.g., scientific, political, and social). In particular, in the health area, social networks represent a channel to communicate and disseminate novel treatments’ success; they also allow ordinary people to express their concerns about a disease or disorder. The Artificial Intelligence (AI) community has developed analytical methods to uncover and predict patterns from posts that enable it to explain news about a particular topic, e.g., mental disorders expressed as eating disorders or depression. Albeit potentially rich while expressing an idea or concern, posts are presented as short texts, preventing, thus, AI models from accurately encoding these posts’ contextual knowledge. We propose a hybrid approach where knowledge encoded in community-maintained knowledge graphs (e.g., Wikidata) is combined with deep learning to categorize social media posts using existing classification models. The proposed approach resorts to state-of-the-art named entity recognizers and linkers (e.g., Falcon 2.0) to extract entities in short posts and link them to concepts in knowledge graphs. Then, knowledge graph embeddings (KGEs) are utilized to compute latent representations of the extracted entities, which result in vector representations of the posts that encode these entities’ contextual knowledge extracted from the knowledge graphs. These KGEs are combined with contextualized word embeddings (e.g., BERT) to generate a context-based representation of the posts that empower prediction models. We apply our proposed approach in the health domain to detect whether a publication is related to an eating disorder (e.g., anorexia or bulimia) and uncover concepts within the discourse that could help healthcare providers diagnose this type of mental disorder. We evaluate our approach on a dataset of 2,000 tweets about eating disorders. Our experimental results suggest that combining contextual knowledge encoded in word embeddings with the one built from knowledge graphs increases the reliability of the predictive models. The ambition is that the proposed method can support health domain experts in discovering patterns that may forecast a mental disorder, enhancing early detection and more precise diagnosis towards personalized medicine.

【 授权许可】

Unknown