RECOST: External Knowledge Guided Data-efficient Instruction Tuning

• URL: http://arxiv.org/abs/2402.17355v1
• Date: Tue, 27 Feb 2024 09:47:36 GMT
• Title: RECOST: External Knowledge Guided Data-efficient Instruction Tuning
• Authors: Qi Zhang, Yiming Zhang, Haobo Wang, Junbo Zhao
• Abstract summary: We argue that most current data-efficient instruction-tuning methods are highly dependent on the quality of the original instruction-tuning dataset. We propose a framework dubbed as textbfRECOST, which integrates external-knowledge-base re-ranking and diversity-consistent sampling into a single pipeline.
• Score: 25.985023475991625
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In the current landscape of large language models (LLMs), the process of instruction tuning serves as an essential step. Considering the high computing power overhead, data-efficient instruction tuning was proposed to reduce the training data size in this process, aiming at selecting high-quality instructional data. Nevertheless, we argue that most current data-efficient instruction-tuning methods are highly dependent on the quality of the original instruction-tuning dataset. When it comes to datasets synthesized by LLMs, a common scenario in this field, dirty samples will even be selected with a higher probability than other samples. To address these challenges, we utilized external knowledge (relevant examples or paragraphs) to evaluate those samples synthesized by LLMs with an in-context-based relative predictive entropy. Based on the new metric, we proposed a framework, dubbed as \textbf{RECOST}, which integrates external-knowledge-base re-ranking and diversity-consistent sampling into a single pipeline. Through extensive experiments on several synthetic datasets (Alpaca and Alpaca-gpt4), we demonstrate the effectiveness of our method and achieve even better results with only \textbf{1\%} of the full dataset.

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