Improving the robustness of NLI models with minimax training (2023.acl-long)

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Challenge: Experimental results show that our method consistently outperforms other robustness enhancement techniques on out-of-distribution adversarial test sets, while maintaining high in-distance accuracy.
Approach: They propose a minimax objective between a learner model being trained for the task and an auxiliary model aiming to maximize the learner's loss by up-weighting underrepresented "hard" examples with patterns that contradict the shortcuts learned from the prevailing "easy" examples.
Outcome: The proposed method outperforms other robustness enhancement techniques on out-of-distribution adversarial test sets while maintaining high in-distance accuracy.

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Towards Interpreting and Mitigating Shortcut Learning Behavior of NLU models (2021.naacl-main)

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Challenge: Recent studies indicate that NLU models are prone to rely on shortcut features for prediction, without achieving true language understanding.
Approach: They propose a shortcut mitigation framework to suppress NLU models from making overconfident predictions for samples with large shortcut degree.
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End-to-End Bias Mitigation by Modelling Biases in Corpora (2020.acl-main)

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Challenge: Recent studies have shown that strong natural language understanding models are prone to relying on unwanted dataset biases without learning the underlying task.
Approach: They propose two learning strategies to train neural models that are more robust to dataset biases and transfer better to out-of-domain datasets.
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Mind the Trade-off: Debiasing NLU Models without Degrading the In-distribution Performance (2020.acl-main)

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Challenge: Recent studies show that pre-trained language models rely heavily on idiosyncratic biases of datasets.
Approach: They propose a method which discourages models from exploiting biases while enabling them to receive enough incentive to learn from all the training examples.
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End-to-End Self-Debiasing Framework for Robust NLU Training (2021.findings-acl)

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Challenge: Existing models incorporate dataset biases leading to strong performance on in-distribution test sets but poor performance on out-of-distortion (OOD) tests.
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Investigating Ensemble Methods for Model Robustness Improvement of Text Classifiers (2022.findings-emnlp)

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Challenge: Existing methods to reduce model's reliance on bias features ignore the learnability of these features.
Approach: They propose to reduce models' reliance on bias features by first training models with fixed low-capacity models which ignore the learnability of the bias features.
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Avoiding the Hypothesis-Only Bias in Natural Language Inference via Ensemble Adversarial Training (2020.emnlp-main)

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Challenge: Neural models pick up on annotation artefacts and spurious correlations, resulting in learning sentences that suffer from the same biases.
Approach: They propose to tackle this problem by using adversarial training to reduce the bias in sentence representations by using an ensemble of adversaries.
Outcome: The proposed approach produces more robust models outperforming previous de-biasing efforts when generalised to 12 other NLI datasets.
Mitigating Shortcuts in Language Models with Soft Label Encoding (2024.lrec-main)

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Challenge: Recent studies have shown that large language models rely on spurious correlations in the data for natural language understanding (NLU) tasks.
Approach: They propose a framework for debiasing shortcuts and a dummy class to encode shortcuts into a model and use it to generate soft labels.
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Unsupervised training data re-weighting for natural language understanding with local distribution approximation (2022.emnlp-industry)

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Challenge: a distribution mismatch between offline training and live data can cause biases . cyclic seasonality shifts, and changing pool of users can contribute to this problem .
Approach: They propose an unsupervised approach to mitigate offline training data sampling bias . they propose a local distribution approximation in the pre-trained embedding space .
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Towards Robustifying NLI Models Against Lexical Dataset Biases (2020.acl-main)

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Challenge: Recent studies show that deep learning models exploit dataset biases without deep understanding of the language semantics.
Approach: They propose two methods to debiase models against lexical dataset biases . they use contradiction-word bias and word-overlapping bias as examples .
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Guide the Learner: Controlling Product of Experts Debiasing Method Based on Token Attribution Similarities (2023.eacl-main)

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Challenge: Several proposals have been put forward for improving out-of-distribution performance by mitigating dataset biases.
Approach: They propose a fine-tuning strategy that incorporates the similarity between the main and biased model attribution scores in a Product of Experts (PoE) loss function to further improve OOD performance.
Outcome: The proposed method improves OOD performance while maintaining in-distribution performance.

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