Promptriever: Instruction-Trained Retrievers Can Be Prompted Like Language Models

• URL: http://arxiv.org/abs/2409.11136v1
• Date: Tue, 17 Sep 2024 12:42:55 GMT
• Title: Promptriever: Instruction-Trained Retrievers Can Be Prompted Like Language Models
• Authors: Orion Weller, Benjamin Van Durme, Dawn Lawrie, Ashwin Paranjape, Yuhao Zhang, Jack Hessel,
• Abstract summary: We present Promptriever, the first retrieval model able to be prompted like an LM. Promptriever achieves strong performance on standard retrieval tasks, and also follows instructions.
• Score: 54.272894325370956
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Instruction-tuned language models (LM) are able to respond to imperative commands, providing a more natural user interface compared to their base counterparts. In this work, we present Promptriever, the first retrieval model able to be prompted like an LM. To train Promptriever, we curate and release a new instance-level instruction training set from MS MARCO, spanning nearly 500k instances. Promptriever not only achieves strong performance on standard retrieval tasks, but also follows instructions. We observe: (1) large gains (reaching SoTA) on following detailed relevance instructions (+14.3 p-MRR / +3.1 nDCG on FollowIR), (2) significantly increased robustness to lexical choices/phrasing in the query+instruction (+12.9 Robustness@10 on InstructIR), and (3) the ability to perform hyperparameter search via prompting to reliably improve retrieval performance (+1.4 average increase on BEIR). Promptriever demonstrates that retrieval models can be controlled with prompts on a per-query basis, setting the stage for future work aligning LM prompting techniques with information retrieval.

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