From Balustrades to Pierre Vinken: Looking for Syntax in Transformer Self-Attentions
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Abstract (arXiv)
We inspect the multi-head self-attention in Transformer NMT encoders for three source languages, looking for patterns that could have a syntactic interpretation. In many of the attention heads, we frequently find sequences of consecutive states attending to the same position, which resemble syntactic phrases. We propose a transparent deterministic method of quantifying the amount of syntactic information present in the self-attentions, based on automatically building and evaluating phrase-structure trees from the phrase-like sequences. We compare the resulting trees to existing constituency treebanks, both manually and by computing precision and recall.
Key facts. Cited by 22 papers in the map (data through 7 Oct 2026). First posted on arXiv 5 Jun 2019.
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Citing papers per year: 2021: 6; 2022: 5; 2023: 5; 2024: 2; 2025: 2; 2026: 2.
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- 2021Probing Classifiers: Promises, Shortcomings, and Advancescited by 831
- 2021Incorporating Residual and Normalization Layers into Analysis of Masked Language Modelscited by 50
- 2022Cross-modal Attention Congruence Regularization for Vision-Language Relation Alignmentcited by 17
- 2021Predicting Discourse Trees from Transformer-based Neural Summarizerscited by 10
- 2021Linguistic Dependencies and Statistical Dependencecited by 10
- 2022What does Transformer learn about source code?cited by 9
- 2023Transformer Language Models Handle Word Frequency in Prediction Headcited by 8
- 2021GradTS: A Gradient-Based Automatic Auxiliary Task Selection Method Based on Transformer Networkscited by 7
- 2025Linguistic Interpretability of Transformer-based Language Models: a systematic reviewcited by 7
- 2022Towards Understanding Large-Scale Discourse Structures in Pre-Trained and Fine-Tuned Language Modelscited by 6
- 2026Measuring Affinity between Attention-Head Weight Subspaces via the Projection Kernelcited by 5
- 2023Discourse Structure Extraction from Pre-Trained and Fine-Tuned Language Models in Dialoguescited by 4
10 more
- 2023CUE: An Uncertainty Interpretation Framework for Text Classifiers Built on Pre-Trained Language Modelscited by 3
- 2024Embedded Named Entity Recognition using Probing Classifierscited by 3
- 2022Emergent Linguistic Structures in Neural Networks are Fragilecited by 2
- 2022Revisiting the Practical Effectiveness of Constituency Parse Extraction from Pre-trained Language Modelscited by 1
- 2023Semantic Composition in Visually Grounded Language Modelscited by 1
- 2023Where exactly does contextualization in a PLM happen?cited by 1
- 2025Multilingual Vision-Language Models, A Surveycited by 1
- 2026The Grammar of Transformers: A Systematic Review of Interpretability Research on Syntactic Knowledge in Language Modelscited by 1
- 2021Focused Contrastive Training for Test-based Constituency Analysiscited by 0
- 2024On Eliciting Syntax from Language Models via Hashingcited by 0
- 2026Measuring Affinity between Attention-Head Weight Subspaces via the Projection Kernel15 Jan 2026
- 2026The Grammar of Transformers: A Systematic Review of Interpretability Research on Syntactic Knowledge in Language Models9 Jan 2026
- 2025Multilingual Vision-Language Models, A Survey26 Sep 2025
- 2025Linguistic Interpretability of Transformer-based Language Models: a systematic review9 Apr 2025
- 2024On Eliciting Syntax from Language Models via Hashing5 Oct 2024
- 2024Embedded Named Entity Recognition using Probing Classifiers18 Mar 2024
- 2023Where exactly does contextualization in a PLM happen?11 Dec 2023
- 2023CUE: An Uncertainty Interpretation Framework for Text Classifiers Built on Pre-Trained Language Models6 Jun 2023
- 2023Transformer Language Models Handle Word Frequency in Prediction Head29 May 2023
- 2023Semantic Composition in Visually Grounded Language Models15 May 2023
- 2023Discourse Structure Extraction from Pre-Trained and Fine-Tuned Language Models in Dialogues12 Feb 2023
- 2022Cross-modal Attention Congruence Regularization for Vision-Language Relation Alignment20 Dec 2022
10 more
- 2022Emergent Linguistic Structures in Neural Networks are Fragile31 Oct 2022
- 2022Revisiting the Practical Effectiveness of Constituency Parse Extraction from Pre-trained Language Models15 Sep 2022
- 2022What does Transformer learn about source code?18 Jul 2022
- 2022Towards Understanding Large-Scale Discourse Structures in Pre-Trained and Fine-Tuned Language Models8 Apr 2022
- 2021Focused Contrastive Training for Test-based Constituency Analysis30 Sep 2021
- 2021Incorporating Residual and Normalization Layers into Analysis of Masked Language Models15 Sep 2021
- 2021GradTS: A Gradient-Based Automatic Auxiliary Task Selection Method Based on Transformer Networks13 Sep 2021
- 2021Linguistic Dependencies and Statistical Dependence18 Apr 2021
- 2021Predicting Discourse Trees from Transformer-based Neural Summarizers14 Apr 2021
- 2021Probing Classifiers: Promises, Shortcomings, and Advances24 Feb 2021
- 2021Probing Classifiers: Promises, Shortcomings, and Advancescited by 831
- 2021Incorporating Residual and Normalization Layers into Analysis of Masked Language Modelscited by 50
- 2021Predicting Discourse Trees from Transformer-based Neural Summarizerscited by 10
- 2021Linguistic Dependencies and Statistical Dependencecited by 10
- 2022What does Transformer learn about source code?cited by 9
- 2023Transformer Language Models Handle Word Frequency in Prediction Headcited by 8
- 2021GradTS: A Gradient-Based Automatic Auxiliary Task Selection Method Based on Transformer Networkscited by 7
- 2025Linguistic Interpretability of Transformer-based Language Models: a systematic reviewcited by 7
- 2022Towards Understanding Large-Scale Discourse Structures in Pre-Trained and Fine-Tuned Language Modelscited by 6
- 2026Measuring Affinity between Attention-Head Weight Subspaces via the Projection Kernelcited by 5
- 2023Discourse Structure Extraction from Pre-Trained and Fine-Tuned Language Models in Dialoguescited by 4
- 2023CUE: An Uncertainty Interpretation Framework for Text Classifiers Built on Pre-Trained Language Modelscited by 3
12 most cited of 20 All 20 (JSON)
- 2026Measuring Affinity between Attention-Head Weight Subspaces via the Projection Kernel15 Jan 2026
- 2026The Grammar of Transformers: A Systematic Review of Interpretability Research on Syntactic Knowledge in Language Models9 Jan 2026
- 2025Linguistic Interpretability of Transformer-based Language Models: a systematic review9 Apr 2025
- 2024On Eliciting Syntax from Language Models via Hashing5 Oct 2024
- 2024Embedded Named Entity Recognition using Probing Classifiers18 Mar 2024
- 2023Where exactly does contextualization in a PLM happen?11 Dec 2023
- 2023CUE: An Uncertainty Interpretation Framework for Text Classifiers Built on Pre-Trained Language Models6 Jun 2023
- 2023Transformer Language Models Handle Word Frequency in Prediction Head29 May 2023
- 2023Semantic Composition in Visually Grounded Language Models15 May 2023
- 2023Discourse Structure Extraction from Pre-Trained and Fine-Tuned Language Models in Dialogues12 Feb 2023
- 2022Emergent Linguistic Structures in Neural Networks are Fragile31 Oct 2022
- 2022Revisiting the Practical Effectiveness of Constituency Parse Extraction from Pre-trained Language Models15 Sep 2022
12 newest of 20 All 20 (JSON)