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ECI: Effective Contrastive Information to Evaluate Hard-Negatives

Aarush Sinha, Rahul Seetharaman, Aman Bansal
Jun 5, 2026 at 04:00
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arXiv:2603.20990v2 Announce Type: replace-cross Abstract: Hard-negative source selection for dense retrieval is usually decided only after fine-tuning and downstream evaluation. We propose Effective Contrastive Information (ECI), a training-free diagnostic that ranks candidate negative sources using frozen target-encoder embeddings. ECI is...

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