Levels of processing and language modality specificity in working memory

NEUROPSYCHOLOGIA

卷:51

Article

Rudner, Mary^1,2  Karlsson, Thomas^1,2,3  Gunnarsson, Johan¹  Ronnberg, Jerker^1,2 

[1] Linkoping Univ, Dept Behav Sci & Learning, Swedish Inst Disabil Res, SE-58183 Linkoping, Sweden

[2] Linkoping Univ, Dept Behav Sci & Learning, Linnaeus Ctr HEAD, SE-58183 Linkoping, Sweden

[3] Linkoping Univ, Ctr Med Image Sci & Visualizat CMIV, SE-58183 Linkoping, Sweden

关键词: Sign language;    Speech;    Working memory;    Levels of processing;    fMRI;    Semantic;    Phonological;    Orthographic;   

DOI  :  10.1016/j.neuropsychologia.2012.12.011

来源: Elsevier

【 摘 要 】

Neural networks underpinning working memory demonstrate sign language specific components possibly related to differences in temporary storage mechanisms. A processing approach to memory systems suggests that the organisation of memory storage is related to type of memory processing as well. In the present study, we investigated for the first time semantic, phonological and orthographic processing in working memory for sign- and speech-based language. During fMRI we administered a picture-based 2-back working memory task with Semantic, Phonological, Orthographic and Baseline conditions to 11 deaf signers and 20 hearing non-signers. Behavioural data showed poorer and slower performance for both groups in Phonological and Orthographic conditions than in the Semantic condition, in line with depth-of-processing theory. An exclusive masking procedure revealed distinct sign-specific neural networks supporting working memory components at all three levels of processing. The overall pattern of sign-specific activations may reflect a relative intermodality difference in the relationship between phonology and semantics influencing working memory storage and processing. (C) 2012 Elsevier Ltd. All rights reserved.

【 授权许可】

Free