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Journal article
Reduced short-term memory span in aphasia and susceptibility to interference: Contribution of material-specific maintenance deficits
Neuropsychologia, v 48(4), pp 909-920
01 Mar 2010
PMID: 19925813
Abstract
Semantic short-term memory (STM) deficits have been traditionally defined as an inability to maintain semantic representations over a delay (Martin et al., 1994b). Yet some patients with semantic STM deficits make numerous intrusions of items from previously presented lists, thus presenting an interesting paradox: why should an inability to maintain semantic representations produce an increase in intrusions from earlier lists? In this study, we investigated the relationship between maintenance deficits and susceptibility to interference in a group of 20 aphasic patients characterized with weak semantic or weak phonological STM. Patients and matched control participants performed a modified item-recognition task designed to elicit semantic or phonological interference from list items located one, two. or three trials back (Hamilton & Martin, 2007). Controls demonstrated significant effects of interference in both versions of the task. Interference in patients was predicted by the type and severity of their STM deficit: that is, shorter semantic spans were associated with greater semantic interference and shorter phonological spans were associated with greater phonological interference. We interpret these results through a new perspective, the reactivation hypothesis, and we discuss their importance for accounts emphasizing the contribution of maintenance mechanisms for STM impairments in aphasia as well as susceptibility to interference. (C) 2009 Elsevier Ltd. All rights reserved.
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Details
- Title
- Reduced short-term memory span in aphasia and susceptibility to interference: Contribution of material-specific maintenance deficits
- Creators
- Laura H. F. Barde - Moss Rehabilitation HospitalMyrna F. Schwartz - University of PennsylvaniaEvangelia G. Chrysikou - Moss Rehabilitation HospitalSharon L. Thompson-Schill - University of Pennsylvania
- Publication Details
- Neuropsychologia, v 48(4), pp 909-920
- Publisher
- Elsevier
- Number of pages
- 12
- Grant note
- Albert Einstein Society R01-DC00191-28 / NIDCD; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD) R01DC000191 / NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD) R01-DC009209 / NIH; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Arts and Sciences
- Web of Science ID
- WOS:000275933500008
- Scopus ID
- 2-s2.0-76749132548
- Other Identifier
- 991020531854904721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Behavioral Sciences
- Neurosciences
- Psychology, Experimental