作者位次 #3/6SIGIR 2026Oral· Information Retrieval (Full)
Diagnosing and Mitigating Mid-Sequence Degradation in Recommender Systems
Linjiang Guo · Nitin Bisht · Shiqing Wu · Huan Huo · Xianzhi Wang · Guandong Xu
摘要
Although attention-based sequential recommenders have achieved strong accuracy, they can exhibit a systematic failure mode, i.e., lost-in-the-middle, where attention disproportionately concentrates on sequence boundaries to informative middle behaviors. Through controlled perturbations, we find t...