Incremental User Embedding Modeling for Personalized Text Classification

Individual user profiles and interaction histories play a significant role in providing customized experiences in real-world applications such as chatbots, social media, retail, and education. Adaptive user representation learning by utilizing user personalized information has be-come increasingly challenging due to ever-growing his-tory data. In this work, we propose an incremental user embedding modeling approach, in which embeddings of user’s recent interaction histories are dynamically integrated into the accumulated history vectors via a trans-former encoder. This modeling paradigm allows us to create generalized user representations in a consecutive manner and also alleviate the challenges of data management. We demonstrate the effectiveness of this approach by applying it to a personalized multi-class classification task based on the Reddit dataset, and achieve 9% and 30% relative improvement on prediction accuracy over a baseline system for two experiment settings through appropriate comment history encoding and task modeling.