Targeted Syntactic Evaluation of Language Models
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Abstract (arXiv)
We present a dataset for evaluating the grammaticality of the predictions of a language model. We automatically construct a large number of minimally different pairs of English sentences, each consisting of a grammatical and an ungrammatical sentence. The sentence pairs represent different variations of structure-sensitive phenomena: subject-verb agreement, reflexive anaphora and negative polarity items. We expect a language model to assign a higher probability to the grammatical sentence than the ungrammatical one. In an experiment using this data set, an LSTM language model performed poorly on many of the constructions. Multi-task training with a syntactic objective (CCG supertagging) improved the LSTM's accuracy, but a large gap remained between its performance and the accuracy of human participants recruited online. This suggests that there is considerable room for improvement over LSTMs in capturing syntax in a language model.
Key facts. Cited by 239 papers in the map (data through 7 Oct 2026). First posted on arXiv 27 Aug 2018.
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Citing papers per year: 2021: 51; 2022: 47; 2023: 35; 2024: 38; 2025: 35; 2026: 33.
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- 2021Masked Language Modeling and the Distributional Hypothesis: Order Word Matters Pre-training for Littlecited by 176
- 2022Towards Faithful Model Explanation in NLP: A Surveycited by 129
- 2021Causal Analysis of Syntactic Agreement Mechanisms in Neural Language Modelscited by 127
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- 2026FreqBLiMP: Frequency-Controlled Minimal Pairs Reveal Robustness and Fragility of LLMs Under Lexical Rarity7 Sep 2026
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- 2026(V)LMs generalize beyond surface co-occurrence: Evidence from cross-modal number agreement31 Aug 2026
- 2026CLIN: an Objective Framework for Evaluating Creativity in Short Persian Literary Text31 Aug 2026
- 2026Language Models Generalize to Human-like Word Order Preferences5 Aug 2026
- 2026Exposure is Optional: Learning Unlike Coordination in Language Models22 Jul 2026
- 2026Linear representations of grammaticality in neural language models16 Jul 2026
- 2026Light or Full Verb? A Minimal-Pair Dataset for Probing Phraseological Competence in Language Models3 Jun 2026
- 2026Do Language Models Know What Not to Say? Causal Evidence for Statistical Preemption in LLMs21 May 2026
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