A Domain Adaptive Graph Learning Framework to Early Detection of Emergent Healthcare Misinformation on Social Media

A fundamental issue in healthcare misinformation detection is the lack of timely resources (e.g., medical knowledge, annotated data), making it challenging to accurately detect emergent healthcare misinformation at an early stage. In this paper, we develop a crowdsourcing-based early healthcare misinformation detection framework that jointly exploits the medical expertise of expert crowd workers and adapts the medical knowledge from a source domain (e.g., COVID-19) to detect misleading posts in an emergent target domain (e.g., Mpox, Polio). Two important challenges exist in developing our solution: (i) How to leverage the complex and noisy knowledge from the source domain to facilitate the detection of misinformation in the target domain? (ii) How to effectively utilize the limited amount of expert workers to correct the inapplicable knowledge facts in the source domain and adapt the corrected facts to examine the truthfulness of the posts in the emergent target domain? To address these challenges, we develop CrowdAdapt, a crowdsourcing-based domain adaptive approach that effectively identifies and adapts relevant knowledge facts from the source domain to accurately detect misinformation in the target domain. Evaluation results from two real-world case studies demonstrate the superiority of CrowdAdapt over state-of-the-art baselines in accurately detecting emergent healthcare misinformation.