Large Language Models Are Human-Like Internally
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Abstract (arXiv)
Recent cognitive modeling studies have reported that larger language models (LMs) exhibit a poorer fit to human reading behavior (Oh and Schuler, 2023b; Shain et al., 2024; Kuribayashi et al., 2024), leading to claims of their cognitive implausibility. In this paper, we revisit this argument through the lens of mechanistic interpretability and argue that prior conclusions were skewed by an exclusive focus on the final layers of LMs. Our analysis reveals that next-word probabilities derived from internal layers of larger LMs align with human sentence processing data as well as, or better than, those from smaller LMs. This alignment holds consistently across behavioral (self-paced reading times, gaze durations, MAZE task processing times) and neurophysiological (N400 brain potentials) measures, challenging earlier mixed results and suggesting that the cognitive plausibility of larger LMs has been underestimated. Furthermore, we first identify an intriguing relationship between LM layers and human measures: earlier layers correspond more closely with fast gaze durations, while later layers better align with relatively slower signals such as N400 potentials and MAZE processing times. Our work opens new avenues for interdisciplinary research at the intersection of mechanistic interpretability and cognitive modeling.
Key facts. Cited by 28 papers in the map (data through 7 Oct 2026). Builds on 43 of its 103 references that are in the map. First posted on arXiv 3 Feb 2025.
Builds on
43 of 103 references.
References · 43
- 2022OPT: Open Pre-trained Transformer Language Modelscited by 3,464
- 2023Pythia: A Suite for Analyzing Large Language Models Across Training and Scalingcited by 1,734
- 2019BERT Rediscovers the Classical NLP Pipelinecited by 1,046
- 2019How Contextual are Contextualized Word Representations? Comparing the Geometry of BERT, ELMo, and GPT-2 Embeddingscited by 770
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- 2016Adaptive Computation Time for Recurrent Neural Networkscited by 479
- 2021Few-shot Learning with Multilingual Language Modelscited by 278
- 2024Do Llamas Work in English? On the Latent Language of Multilingual Transformerscited by 275
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- 2021PonderNet: Learning to Pondercited by 156
- 2022Analyzing Transformers in Embedding Spacecited by 131
31 more
- 2019Interpreting and improving natural-language processing (in machines) with natural language-processing (in the brain)cited by 128
- 2018Multilingual Constituency Parsing with Self-Attention and Pre-Trainingcited by 117
- 2019On Identifiability in Transformerscited by 115
- 2020On the Predictive Power of Neural Language Models for Human Real-Time Comprehension Behaviorcited by 115
- 2022Why Does Surprisal From Larger Transformer-Based Language Models Provide a Poorer Fit to Human Reading Times?cited by 111
- 2016Recurrent Neural Network Grammarscited by 109
- 2021Lower Perplexity is Not Always Human-Likecited by 52
- 2020Human Sentence Processing: Recurrence or Attention?cited by 51
- 2024Language models align with human judgments on key grammatical constructionscited by 49
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- 2017The Natural Stories Corpuscited by 40
- 2023Transformer-Based Language Model Surprisal Predicts Human Reading Times Best with About Two Billion Training Tokenscited by 39
- 2023Instruction-tuning Aligns LLMs to the Human Braincited by 39
- 2024Frequency Explains the Inverse Correlation of Large Language Models' Size, Training Data Amount, and Surprisal's Fit to Reading Timescited by 37
- 2021A Targeted Assessment of Incremental Processing in Neural LanguageModels and Humanscited by 32
- 2022Context Limitations Make Neural Language Models More Human-Likecited by 32
- 2024Leading Whitespaces of Language Models' Subword Vocabulary Pose a Confound for Calculating Word Probabilitiescited by 30
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- 2024On the Role of Context in Reading Time Predictioncited by 17
- 2023Words, Subwords, and Morphemes: What Really Matters in the Surprisal-Reading Time Relationship?cited by 13
- 2024On the Proper Treatment of Tokenization in Psycholinguisticscited by 12
- 2022Analyzing Wrap-Up Effects through an Information-Theoretic Lenscited by 10
- 2024Towards a Similarity-adjusted Surprisal Theorycited by 9
- 2014Tracking Dynamic Point Processes on Networkscited by 8
- 2024Revenge of the Fallen? Recurrent Models Match Transformers at Predicting Human Language Comprehension Metricscited by 6
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- 2023Psychometric Predictive Power of Large Language Modelscited by 4
- 2024SPAWNing Structural Priming Predictions from a Cognitively Motivated Parsercited by 3
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Citing papers per year: 2025: 11; 2026: 17.
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- 2025Anything Goes? A Crosslinguistic Study of (Im)possible Language Learning in LMscited by 20
- 2025Agentic Knowledgeable Self-awarenesscited by 8
- 2025Diversity Boosts AI-Generated Text Detectioncited by 6
- 2026Label Effects: Shared Heuristic Reliance in Trust Assessment by Humans and LLM-as-a-Judgecited by 3
- 2026When Meaning Isn't Literal: Exploring Idiomatic Meaning Across Languages and Modalitiescited by 3
- 2025Leveraging Human Production-Interpretation Asymmetries to Test LLM Cognitive Plausibilitycited by 2
- 2025Signatures of human-like processing in Transformer forward passescited by 2
- 2025A Spatio-Temporal Point Process for Fine-Grained Modeling of Reading Behaviorcited by 2
- 2025Comparing Human and Language Models Sentence Processing Difficulties on Complex Structurescited by 2
- 2025Metacognitive Sensitivity for Test-Time Dynamic Model Selectioncited by 2
- 2026Dual Alignment Between Language Model Layers and Human Sentence Processingcited by 2
- 2026On the Proper Treatment of Units in Surprisal Theorycited by 2
16 more
- 2025Vectors from Larger Language Models Predict Human Reading Time and fMRI Data More Poorly when Dimensionality Expansion is Controlledcited by 1
- 2025AI Through the Human Lens: Investigating Cognitive Theories in Machine Psychologycited by 1
- 2026Clozing the Gap: Exploring Why Language Model Surprisal Outperforms Cloze Surprisalcited by 1
- 2025In Machina N400: Pinpointing Where a Causal Language Model Detects Semantic Violationscited by 0
- 2026CBMAS: Cognitive Behavioral Modeling via Activation Steeringcited by 0
- 2026Is Cross-Lingual Transfer in Bilingual Models Human-Like? A Study with Overlapping Word Forms in Dutch and Englishcited by 0
- 2026Causal Drawbridges: Characterizing Gradient Blocking of Syntactic Islands in Transformer LMscited by 0
- 2026Probing for Reading Timescited by 0
- 2026When Context Misleads: Surprisal, Energy and Attention Entropy as Metrics of Coherence Illusions in LLMscited by 0
- 2026Timesteps of Mamba Align with Human Reading Timescited by 0
- 2026Production and Perception in LLMs: A Token Probability Approachcited by 0
- 2026Surprisal Theory is Tautological (without Rational Grounding)cited by 0
- 2026On the use of foundation models in cognitive sciencecited by 0
- 2026Causal Interventions Reveal Typologically Organized Syntactic Mechanisms in Multilingual Language Modelscited by 0
- 2026Using LMs to Model the Effects of Context and Coreference during Sentence Comprehensioncited by 0
- 2026Reader Proficiency Shapes Layer-wise Surprisal Profilescited by 0
- 2026Reader Proficiency Shapes Layer-wise Surprisal Profiles29 Sep 2026
- 2026Using LMs to Model the Effects of Context and Coreference during Sentence Comprehension26 Sep 2026
- 2026Causal Interventions Reveal Typologically Organized Syntactic Mechanisms in Multilingual Language Models28 Aug 2026
- 2026On the use of foundation models in cognitive science7 Aug 2026
- 2026Surprisal Theory is Tautological (without Rational Grounding)23 Jul 2026
- 2026Production and Perception in LLMs: A Token Probability Approach13 Jul 2026
- 2026Timesteps of Mamba Align with Human Reading Times29 Jun 2026
- 2026When Context Misleads: Surprisal, Energy and Attention Entropy as Metrics of Coherence Illusions in LLMs19 Jun 2026
- 2026On the Proper Treatment of Units in Surprisal Theory30 Apr 2026
- 2026Probing for Reading Times20 Apr 2026
- 2026Dual Alignment Between Language Model Layers and Human Sentence Processing20 Apr 2026
- 2026Causal Drawbridges: Characterizing Gradient Blocking of Syntactic Islands in Transformer LMs15 Apr 2026
16 more
- 2026When Meaning Isn't Literal: Exploring Idiomatic Meaning Across Languages and Modalities12 Apr 2026
- 2026Is Cross-Lingual Transfer in Bilingual Models Human-Like? A Study with Overlapping Word Forms in Dutch and English8 Apr 2026
- 2026Label Effects: Shared Heuristic Reliance in Trust Assessment by Humans and LLM-as-a-Judge7 Apr 2026
- 2026Clozing the Gap: Exploring Why Language Model Surprisal Outperforms Cloze Surprisal14 Jan 2026
- 2026CBMAS: Cognitive Behavioral Modeling via Activation Steering3 Jan 2026
- 2025Metacognitive Sensitivity for Test-Time Dynamic Model Selection11 Dec 2025
- 2025In Machina N400: Pinpointing Where a Causal Language Model Detects Semantic Violations24 Nov 2025
- 2025Comparing Human and Language Models Sentence Processing Difficulties on Complex Structures8 Oct 2025
- 2025Diversity Boosts AI-Generated Text Detection23 Sep 2025
- 2025A Spatio-Temporal Point Process for Fine-Grained Modeling of Reading Behavior24 Jun 2025
- 2025AI Through the Human Lens: Investigating Cognitive Theories in Machine Psychology22 Jun 2025
- 2025Vectors from Larger Language Models Predict Human Reading Time and fMRI Data More Poorly when Dimensionality Expansion is Controlled18 May 2025
- 2025Signatures of human-like processing in Transformer forward passes18 Apr 2025
- 2025Agentic Knowledgeable Self-awareness4 Apr 2025
- 2025Leveraging Human Production-Interpretation Asymmetries to Test LLM Cognitive Plausibility21 Mar 2025
- 2025Anything Goes? A Crosslinguistic Study of (Im)possible Language Learning in LMs26 Feb 2025
- 2025Agentic Knowledgeable Self-awarenesscited by 8
- 2025Agentic Knowledgeable Self-awareness4 Apr 2025
- 2026Timesteps of Mamba Align with Human Reading Timescited by 0
- 2026Timesteps of Mamba Align with Human Reading Times29 Jun 2026
- 2025Anything Goes? A Crosslinguistic Study of (Im)possible Language Learning in LMscited by 20
- 2025Diversity Boosts AI-Generated Text Detectioncited by 6
- 2026Label Effects: Shared Heuristic Reliance in Trust Assessment by Humans and LLM-as-a-Judgecited by 3
- 2026When Meaning Isn't Literal: Exploring Idiomatic Meaning Across Languages and Modalitiescited by 3
- 2025Leveraging Human Production-Interpretation Asymmetries to Test LLM Cognitive Plausibilitycited by 2
- 2025Signatures of human-like processing in Transformer forward passescited by 2
- 2025A Spatio-Temporal Point Process for Fine-Grained Modeling of Reading Behaviorcited by 2
- 2025Comparing Human and Language Models Sentence Processing Difficulties on Complex Structurescited by 2
- 2025Metacognitive Sensitivity for Test-Time Dynamic Model Selectioncited by 2
- 2026Dual Alignment Between Language Model Layers and Human Sentence Processingcited by 2
- 2026On the Proper Treatment of Units in Surprisal Theorycited by 2
- 2025Vectors from Larger Language Models Predict Human Reading Time and fMRI Data More Poorly when Dimensionality Expansion is Controlledcited by 1
12 most cited of 26 All 26 (JSON)
- 2026Reader Proficiency Shapes Layer-wise Surprisal Profiles29 Sep 2026
- 2026Using LMs to Model the Effects of Context and Coreference during Sentence Comprehension26 Sep 2026
- 2026Causal Interventions Reveal Typologically Organized Syntactic Mechanisms in Multilingual Language Models28 Aug 2026
- 2026On the use of foundation models in cognitive science7 Aug 2026
- 2026Surprisal Theory is Tautological (without Rational Grounding)23 Jul 2026
- 2026Production and Perception in LLMs: A Token Probability Approach13 Jul 2026
- 2026When Context Misleads: Surprisal, Energy and Attention Entropy as Metrics of Coherence Illusions in LLMs19 Jun 2026
- 2026On the Proper Treatment of Units in Surprisal Theory30 Apr 2026
- 2026Probing for Reading Times20 Apr 2026
- 2026Dual Alignment Between Language Model Layers and Human Sentence Processing20 Apr 2026
- 2026Causal Drawbridges: Characterizing Gradient Blocking of Syntactic Islands in Transformer LMs15 Apr 2026
- 2026When Meaning Isn't Literal: Exploring Idiomatic Meaning Across Languages and Modalities12 Apr 2026
12 newest of 26 All 26 (JSON)