Colorless green recurrent networks dream hierarchically
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Abstract (arXiv)
Recurrent neural networks (RNNs) have achieved impressive results in a variety of linguistic processing tasks, suggesting that they can induce non-trivial properties of language. We investigate here to what extent RNNs learn to track abstract hierarchical syntactic structure. We test whether RNNs trained with a generic language modeling objective in four languages (Italian, English, Hebrew, Russian) can predict long-distance number agreement in various constructions. We include in our evaluation nonsensical sentences where RNNs cannot rely on semantic or lexical cues ("The colorless green ideas I ate with the chair sleep furiously"), and, for Italian, we compare model performance to human intuitions. Our language-model-trained RNNs make reliable predictions about long-distance agreement, and do not lag much behind human performance. We thus bring support to the hypothesis that RNNs are not just shallow-pattern extractors, but they also acquire deeper grammatical competence.
Key facts. Cited by 213 papers in the map (data through 14 Oct 2026). First posted on arXiv 29 Mar 2018.
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Citing papers per year: 2021: 60; 2022: 41; 2023: 34; 2024: 25; 2025: 20; 2026: 33.
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- 2026The Illusion of Superposition? A Principled Analysis of Latent Thinking in Language Models7 Apr 2026
- 2026Clause-Internal or Clause-External? Testing Turkish Reflexive Binding in Adapted versus Chain of Thought Large Language Models30 Jan 2026
- 2025LingGym: How Far Are LLMs from Thinking Like Field Linguists?1 Nov 2025
- 2024What Goes Into a LM Acceptability Judgment? Rethinking the Impact of Frequency and Length4 Nov 2024
- 2023CompA: Addressing the Gap in Compositional Reasoning in Audio-Language Models12 Oct 2023
- 2023Dissociating language and thought in large language models16 Jan 2023
- 2022Winoground: Probing Vision and Language Models for Visio-Linguistic Compositionality7 Apr 2022
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- 2021XTREME-R: Towards More Challenging and Nuanced Multilingual Evaluationcited by 168
- 2021Causal Analysis of Syntactic Agreement Mechanisms in Neural Language Modelscited by 131
- 2023The Learnability of In-Context Learningcited by 127
- 2021How much do language models copy from their training data? Evaluating linguistic novelty in text generation using RAVENcited by 124
- 2022What Artificial Neural Networks Can Tell Us About Human Language Acquisitioncited by 99
- 2022State-of-the-art generalisation research in NLP: A taxonomy and reviewcited by 98
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12 most cited of 198 All 198 (JSON)
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- 2026A generative-informed neuro-symbolic framework for syntactic ambiguity resolution: Evidence from Arabic DPs1 Oct 2026
- 2026Assessing the Impact of Language Disparity on Multilingual Linguistic Ability in Large Language Models30 Sep 2026
- 2026Encoded but Not Decoded: Layer-Localized Evidence for a Three-Level Gap in LLM Syntax24 Sep 2026
- 2026Grammatical "grandmother neurons" are rare in LLMs24 Sep 2026
- 2026FreqBLiMP: Frequency-Controlled Minimal Pairs Reveal Robustness and Fragility of LLMs Under Lexical Rarity7 Sep 2026
- 2026(V)LMs generalize beyond surface co-occurrence: Evidence from cross-modal number agreement31 Aug 2026
- 2026Language Models Generalize to Human-like Word Order Preferences5 Aug 2026
- 2026Exposure is Optional: Learning Unlike Coordination in Language Models22 Jul 2026
- 2026Do Language Models Know What Not to Say? Causal Evidence for Statistical Preemption in LLMs21 May 2026
- 2026Collocational bootstrapping: A hypothesis about the learning of subject-verb agreement in humans and neural networks19 May 2026
12 newest of 198 All 198 (JSON)