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Making sense of reference

Project description

Real-time language mapping in psychosis

Language is vulnerable in psychosis. Previous evidence shows that speech patterns in patients diverge both at conceptual and referential levels of meaning. The ERC-funded SENSOR project conceptualises grammar as a mechanism mediating the transition from lexical concepts in semantic memory to referential meaning in speech. Using magnetoencephalography, the team will implement an experiment to study brain reactions to lexical and referential semantic violations, at a millisecond resolution. They will hypothesise that the transition in question involves a cortical-hippocampal loop, which may be altered in psychosis. Overall, the project develops a new conceptual and experimental framework for a better understanding of the mechanistic basis of language anomalies in psychosis, and of language as such.

Objective

The distinction between sense and reference has been foundational in the study of linguistic meaning since Frege’s classic On sense and reference (1892). More than a century later, the neural correlates of reference remain opaque. Meanwhile in computational psychiatry, a burgeoning field uses computational neural language models (NLMs) to predict psychosis from spontaneous speech. Clear behavioural evidence has emerged that patients with psychosis navigate the semantic space differently when retrieving words and building them into grammatical structures, causing shifts in patterns that are detectable through computational semantic similarity and probabilistic metrics. We propose the new concept that (i) grammar plays a specific role in mapping concepts onto referents so as to construct a cognitive map, which (ii) can be tracked in real time at a millisecond level, (iii) involves a cortical-hippocampal loop, and (iv) is a neural mechanism vulnerable in psychosis. Using MEG with optically pumped magnetometers (OPM), we will implement a naturalistic story comprehension paradigm in which the construction of reference through grammar will be tracked and regressed on computational semantic metrics. We aim to generate value through a novel sustainable, theoretically and computationally grounded framework for the study of language in psychosis, which will enable a transition to the larger goal of fully exploiting spontaneous speech as a rich and multidimensional data source for clinical practice.

Fields of science (EuroSciVoc)

Programme(s)

Topic(s)

Funding Scheme

HORIZON-ERC-POC - HORIZON ERC Proof of Concept Grants

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Call for proposal

(opens in new window) ERC-2024-POC

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Host institution

UNIVERSIDAD POMPEU FABRA
Net EU contribution
€ 50 000,00
Address
PLACA DE LA MERCE, 10-12
08002 Barcelona
Spain
Region
Este Cataluña Barcelona
Activity type
Higher or Secondary Education Establishments
Links
Total cost
No data

Beneficiaries (2)