Masking or Mitigating? Deconstructing the Impact of Query Rewriting on Retriever Biases in RAG

Agam Goyal, Koyel Mukherjee, Apoorv Saxena +3

Dense retrievers in retrieval-augmented generation (RAG) systems exhibit systematic biases -- including brevity, position, literal matching, and repetition biases -- that can compr…