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Article Dans Une Revue International Journal of Language and Communication Disorders Année : 2023

The role of verbal short‐term memory in complex sentence comprehension: An observational study on aphasia

Résumé

Background: The comprehension profile of people with agrammatism is a debated top-ic. Syntactic complexity and cognitive resources, in particular phonological short-term memory (pSTM), are considered as crucial components by different interpretative accounts. Aim: The aim of the present study was to investigate the interaction of syntactic complexity and of pSTM in sentence comprehension in a group of persons with aphasia with and without agrammatism. Methods & Procedures: A cohort of 30 participants presenting with aphasia was assessed for syntactic comprehension and for pSTM. Fifteen presented with agrammatism and 15 had fluent aphasia. Outcomes & Results: Linear nested mixed-model analyses revealed a significant interaction between sen-tence type and pSTM. In particular, participants with lower pSTM scores showed a reduced comprehension of center-embedded object relatives and long coordinated sentences. Moreover, a significant interaction was found between sentence type and agrammatism, with a lower performance for passives within the agrammatic group. Conclusions & Implications: These results confirm that pSTM is involved in the comprehension of complex structures with an important computational load, in particular coordinated sentences, and long-distance filler gap dependencies. On the contrary, the specific deficit of the agrammatic group with passives is a pure syntactic deficit, with no involvement of pSTM.
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hal-03969198 , version 1 (06-02-2023)

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Giulia Gilardone, Mauro Viganò, Giulio Costantini, Alessia Monti, Massimo Corbo, et al.. The role of verbal short‐term memory in complex sentence comprehension: An observational study on aphasia. International Journal of Language and Communication Disorders, 2023, ⟨10.1111/1460-6984.12851⟩. ⟨hal-03969198⟩
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