MULTI3IR Benchmark: 104.9K Multi-perspective Multi-modal Queries

_reachsumit · x · 2026-09-01

MULTI3IR introduces a benchmark of 104.9K Stack Exchange queries annotated with implicit perspective descriptions to address the lack of multi-domain and multi-modal coverage in existing IR benchmarks. The paper also proposes SPIN, a parameter-efficient method that learns noise vectors to steer embeddings towards diverse semantic directions. Experiments show SPIN substantially improves perspective coverage and generalizes well, revealing a single-perspective bias in current multimodal retrievers.

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