arXiv AI September 2, 2026 By Yitong Han, Wei Gao, Yi Zhao, Prasanta Bhattacharya, Fengzhu Zeng, Mohammad Amanlou

ValueGraph: Value-Signal Guided Graph Pre-training for Contextualized User Representation

ValueGraph is a graph pre‑training framework that incorporates automatically inferred moral‑value signals as soft constraints to learn contextualized user representations. By constructing post‑reply graphs, it captures both semantic and structural information and aligns users through contrastive and clustering objectives based on relative value similarity. Experiments on stance detection and Twitter bot detection demonstrate consistent improvements over strong text‑based, graph‑based, and LLM baselines, underscoring the benefit of value‑signal guidance for socially informed user modeling.

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