How to get by with half a loop - An investigation of visual and auditory codes in a case of impaired phonological short-term memory (pSTM).

TREE, Jeremy J and PLAYFOOT, David (2018). How to get by with half a loop - An investigation of visual and auditory codes in a case of impaired phonological short-term memory (pSTM). Cortex.

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Abstract

In the field of cognitive neuropsychology of phonological short-term memory (pSTM), a key debate surrounds the issue of how impairment on tasks deemed to tap this system imply a dissociable phonological input and output buffer system, with the implication that impairments can be fractionated across disruption to separate functional components (Nickels, Howard & Best, 1997). This study presents CT, a conduction aphasic who showed no impairment on basic auditory discrimination tasks, but had very poor nonword repetition. Clear-cut examples of such cases are very rare (see Jacquemot, Dupoux & Bachoud-Levi, 2007), and we interpret the case with reference to a pSTM model that includes input and output buffers. The dissociation between performance on auditory phonological tasks and visual phonological tasks we interpret as consistent with disruption to the link from input buffer to output buffer without concurrent damage to connections from output to input. Previous research has also shown that patients with impairments of pSTM can make visual confusions with orthographically presented items in tasks seeking to tap this mechanism (Warrington & Shallice, 1972), which might stem from having an incomplete pSTM loop. In light of this we examined whether CT's ability on tests of ISR was affected by visual orthographic similarity among list items, and this is indeed what we observed. On balance then, CT's overall profile is considered best interpreted with respect to a dual buffer pSTM model (e.g., Vallar & Papagno, 2002). [Abstract copyright: Crown Copyright © 2018. Published by Elsevier Ltd. All rights reserved.]

Item Type:	Article
Additional Information:	** From PubMed via Jisc Publications Router **Journal IDs: eissn 1973-8102 **Article IDs: pubmed: 30224160; pii: S0010-9452(18)30258-2 **History: received 01-12-2017; submitted 01-12-2017; revised 01-04-2018; accepted 20-08-2018
Uncontrolled Keywords:	Conduction aphasia, Immediate serial recall, Short-term memory
Research Institute, Centre or Group - Does NOT include content added after October 2018:	Psychology Research Group
Departments - Does NOT include content added after October 2018:	Faculty of Social Sciences and Humanities > Department of Psychology, Sociology and Politics
Identification Number:	https://doi.org/10.1016/j.cortex.2018.08.008
SWORD Depositor:	Margaret Boot
Depositing User:	Margaret Boot
Date Deposited:	15 Oct 2018 14:15
Last Modified:	18 Mar 2021 08:17
URI:	https://shura.shu.ac.uk/id/eprint/22740

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