AI Insight
This study investigated how the human brain encodes Argument Structure Constructions (ASCs) — grammatical patterns such as transitive, ditransitive, caused-motion, and resultative sentences — using EEG recordings from ten native English speakers listening to 200 synthetically generated sentences. Neural analyses revealed construction-specific brain signatures emerging primarily at sentence-final positions and predominantly in the alpha frequency band, where argument structure becomes fully resolved. Critically, the temporal dynamics and similarity structure of these neural representations closely mirrored those found in both recurrent and transformer-based artificial language models, suggesting convergent representational solutions across biological and artificial learning systems.
Why it matters
These findings provide neural evidence supporting Construction Grammar theories of language and suggest that both human brains and AI language models independently converge on similar abstract linguistic representations, which has implications for designing more cognitively plausible AI systems and for advancing our understanding of how grammar is encoded in the brain.
arXiv:2603.29617v2 Announce Type: replace
Abstract: Understanding how the brain processes linguistic constructions is a central challenge in cognitive neuroscience and linguistics. Recent computational studies show that artificial neural language models spontaneously develop differentiated representations of Argument Structure Constructions (ASCs), generating predictions about when and how construction-level information emerges during processing. The present study tests these predictions in human neural activity using electroencephalography (EEG). Ten native English speakers listened to 200 synthetically generated sentences across four construction types (transitive, ditransitive, caused-motion, resultative) while neural responses were recorded. Analyses using time-frequency methods, feature extraction, and machine learning classification revealed construction-specific neural signatures emerging primarily at sentence-final positions, where argument structure becomes fully disambiguated, and most prominently in the alpha band. Pairwise classification showed reliable differentiation, especially between ditransitive and resultative constructions, while other pairs overlapped. Crucially, the temporal emergence and similarity structure of these effects mirror patterns in recurrent and transformer-based language models, where constructional representations arise during integrative processing stages. These findings support the view that linguistic constructions are neurally encoded as distinct form-meaning mappings, in line with Construction Grammar, and suggest convergence between biological and artificial systems on similar representational solutions. More broadly, this convergence is consistent with the idea that learning systems discover stable regions within an underlying representational landscape – recently termed a Platonic representational space – that constrains the emergence of efficient linguistic abstractions.
Source: Convergent Representations of Linguistic Constructions in Human and Artificial Neural Systems