Unmasking Contextual Stereotypes: Measuring and Mitigating BERT's Gender Bias
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Abstract (arXiv)
Contextualized word embeddings have been replacing standard embeddings as the representational knowledge source of choice in NLP systems. Since a variety of biases have previously been found in standard word embeddings, it is crucial to assess biases encoded in their replacements as well. Focusing on BERT (Devlin et al., 2018), we measure gender bias by studying associations between gender-denoting target words and names of professions in English and German, comparing the findings with real-world workforce statistics. We mitigate bias by fine-tuning BERT on the GAP corpus (Webster et al., 2018), after applying Counterfactual Data Substitution (CDS) (Maudslay et al., 2019). We show that our method of measuring bias is appropriate for languages such as English, but not for languages with a rich morphology and gender-marking, such as German. Our results highlight the importance of investigating bias and mitigation techniques cross-linguistically, especially in view of the current emphasis on large-scale, multilingual language models.
Key facts. Cited by 82 papers in the map (data through 7 Oct 2026). First posted on arXiv 27 Oct 2020.
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Citing papers per year: 2021: 6; 2022: 16; 2023: 21; 2024: 16; 2025: 19; 2026: 4.
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- 2021Sustainable Modular Debiasing of Language Modelscited by 98
- 2023Language Model Behavior: A Comprehensive Surveycited by 92
- 2021A Survey on Gender Bias in Natural Language Processingcited by 89
- 2022Theories of "Gender" in NLP Bias Researchcited by 62
- 2022Gender Bias in Masked Language Models for Multiple Languagescited by 60
- 2024Fairness in Large Language Models: A Taxonomic Surveycited by 57
- 2022Entropy-based Attention Regularization Frees Unintended Bias Mitigation from Listscited by 54
- 2022Debiasing isn't enough! -- On the Effectiveness of Debiasing MLMs and their Social Biases in Downstream Taskscited by 48
- 2023Benefits and Harms of Large Language Models in Digital Mental Healthcited by 39
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- 2022Choose Your Lenses: Flaws in Gender Bias Evaluationcited by 29
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- 2026Is She Even Relevant? When BERT Ignores Explicit Gender Cues8 May 2026
- 2026Gender Bias in MT for a Genderless Language: New Benchmarks for Basque9 Mar 2026
- 2026Bias Dynamics in BabyLMs: Towards a Compute-Efficient Sandbox for Democratising Pre-Training Debiasing14 Jan 2026
- 2025Exploring and Mitigating Gender Bias in Encoder-Based Transformer Models1 Nov 2025
- 2025LLM Bias Detection and Mitigation through the Lens of Desired Distributions7 Oct 2025
- 2025Evaluating LLMs for Demographic-Targeted Social Bias Detection: A Comprehensive Benchmark Study6 Oct 2025
- 2025BTC-SAM: Leveraging LLMs for Generation of Bias Test Cases for Sentiment Analysis Models28 Sep 2025
- 2025Measuring Gender Bias in Job Title Matching for Grammatical Gender Languages17 Sep 2025
- 2025Investigating Intersectional Bias in Large Language Models using Confidence Disparities in Coreference Resolution9 Aug 2025
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