All Stories

  1. Understanding and Modeling Heterogeneous Search Behavior

    Article • July 2026, ACM (Association for Computing Machinery)

    Mark Sanderson, Chenglong Ma

  2. Verifiable User Simulation for Search and Recommendation Systems

    Article • July 2026, ACM (Association for Computing Machinery)

    Chenglong Ma, ZIQI XU, Yongli Ren

  3. Task-Aware Automated User Profile Generation for Recommendation Simulation Using Large Language Models

    Article • July 2026, ACM (Association for Computing Machinery)

    Chenglong Ma, ZIQI XU

  4. Mitigating Bias in Large Language Model Based Question Answering through Causal Front Door Prompting

    Article • July 2026, ACM (Association for Computing Machinery)

    ZIQI XU, Chenglong Ma, Yongli Ren, Jie Li, Mark Sanderson

  5. Temporal-Aware User Behaviour Simulation with Large Language Models for Recommender Systems

    Article • November 2025, ACM (Association for Computing Machinery)

    Chenglong Ma, ZIQI XU

  6. PUB: An LLM-Enhanced Personality-Driven User Behaviour Simulator for Recommender System Evaluation

    Article • July 2025, ACM (Association for Computing Machinery)

    ZIQI XU, Yongli Ren, Chenglong Ma

  7. Towards Better Evaluation of Recommendation Algorithms with Bi-directional Item Response Theory

    Article • May 2025, ACM (Association for Computing Machinery)

    ZIQI XU, Yongli Ren, Chenglong Ma

  8. Temporal Conformity-aware Hawkes Graph Network for Recommendations

    Article • May 2024, ACM (Association for Computing Machinery)

    Chenglong Ma, Pablo Castells, Yongli Ren, Mark Sanderson

  9. Classification Algorithm for Skin Color (CASCo): A new tool to measure skin color in social science research

    Article • Social Science Quarterly, February 2023, Wiley

    Chenglong Ma

  10. NEST

    Article • October 2022, ACM (Association for Computing Machinery)

    Yongli Ren, Mark Sanderson, Chenglong Ma, Pablo Castells

  11. How Collaborative Filtering Behaves When Groups of Users Suddenly Shift Preference?

    Article • July 2022, ACM (Association for Computing Machinery)

    Pablo Castells, Mark Sanderson, Yongli Ren, Chenglong Ma