Challenge: Influence-based methods show promise in achieving (1), but often struggle with (2) . data selection is often biased towards high-influence tasks, harming performance on them .
Approach: They propose a Balanced and Influential Data Selection algorithm that normalizes influence scores of training data and iteratively chooses the training example with the highest influence on the most underrepresented task.
Outcome: The proposed model outperforms both state-of-the-art influence-based methods and non-influence-based frameworks on seven benchmarks spanning five diverse capabilities.

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Challenge: Prior selection strategies score samples using generalpurpose LLMs, leveraging their strong language understanding but introducing inherent biases that misalign with the target model’s behavior and yield unstable downstream performance.
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In2Core: Leveraging Influence Functions for Coreset Selection in Instruction Finetuning of Large Language Models (2024.findings-emnlp)

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Challenge: Large Language Models (LLMs) exhibit surprising abilities across a variety of language tasks.
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Data Whisperer: Efficient Data Selection for Task-Specific LLM Fine-Tuning via Few-Shot In-Context Learning (2025.acl-long)

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Challenge: Using fine-tuning on task-specific data is essential for large language models to be effective in specialized tasks.
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ROSE: A Reward-Oriented Data Selection Framework for LLM Task-Specific Instruction Tuning (2025.findings-emnlp)

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Challenge: Prevailing methods for task-specific instruction tuning use similarity metrics to select training data . but instruction tuning loss often fails to exhibit a monotonic relationship with actual task performance .
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Challenge: Existing methods to improve robustness require changing the fine-tuning process or large-scale data augmentation, which are infeasible or cost prohibitive for closed-source models.
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Take the essence and discard the dross: A Rethinking on Data Selection for Fine-Tuning Large Language Models (2025.naacl-long)

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Challenge: Existing studies focus on data selection but lack a clear, unified framework . variability in experimental settings complicates systematic comparisons .
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Influence Scores at Scale for Efficient Language Data Sampling (2023.emnlp-main)

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Challenge: Recent studies have shown that ML models can be fine-tuned on as much data as possible without degradation in performance metrics.
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Smaller Language Models are capable of selecting Instruction-Tuning Training Data for Larger Language Models (2024.findings-acl)

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Challenge: Instruction tuning language models can be expensive and expensive to train . current methods require extensive training on large datasets, resulting in high training costs.
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Stratified Selective Sampling for Instruction Tuning with Dedicated Scoring Strategy (2025.findings-emnlp)

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Challenge: Recent work shows that post-training datasets can be substantially downsampled without noticeably deteriorating performance.
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Selective Reflection-Tuning: Student-Selected Data Recycling for LLM Instruction-Tuning (2024.findings-acl)

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Challenge: Instruction tuning is critical to large language models but its success heavily relies on the training data quality.
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