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Sign and Speech Share Partially Overlapping Conceptual Representations

Evans, Samuel and Price, Cathy J and Diedrichsen, Jörn and Gutierrez-Sigut, Eva and MacSweeney, Mairéad (2019) 'Sign and Speech Share Partially Overlapping Conceptual Representations.' Current Biology, 29 (21). 3739 - 3747.e5. ISSN 0960-9822

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Abstract

Conceptual knowledge is fundamental to human cognition. Yet, the extent to which it is influenced by language is unclear. Studies of semantic processing show that similar neural patterns are evoked by the same concepts presented in different modalities (e.g., spoken words and pictures or text) [1, 2, 3]. This suggests that conceptual representations are “modality independent.” However, an alternative possibility is that the similarity reflects retrieval of common spoken language representations. Indeed, in hearing spoken language users, text and spoken language are co-dependent [4, 5], and pictures are encoded via visual and verbal routes [6]. A parallel approach investigating semantic cognition shows that bilinguals activate similar patterns for the same words in their different languages [7, 8]. This suggests that conceptual representations are “language independent.” However, this has only been tested in spoken language bilinguals. If different languages evoke different conceptual representations, this should be most apparent comparing languages that differ greatly in structure. Hearing people with signing deaf parents are bilingual in sign and speech: languages conveyed in different modalities. Here, we test the influence of modality and bilingualism on conceptual representation by comparing semantic representations elicited by spoken British English and British Sign Language in hearing early, sign-speech bilinguals. We show that representations of semantic categories are shared for sign and speech, but not for individual spoken words and signs. This provides evidence for partially shared representations for sign and speech and shows that language acts as a subtle filter through which we understand and interact with the world.

Item Type: Article
Uncontrolled Keywords: speech, sign language, BSL, fMRI, semantics, bilingualism, conceptual representations, brain imaging
Divisions: Faculty of Science and Health > Psychology, Department of
Depositing User: Elements
Date Deposited: 16 Oct 2019 14:27
Last Modified: 06 Aug 2020 12:16
URI: http://repository.essex.ac.uk/id/eprint/25568

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