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dc.contributor.authorHsiao, Esther Y
Schwartz, Myrna F.
Schnur, Tatiana T
Dell, Gary S
dc.date.accessioned 2013-05-09T19:30:29Z
dc.date.available 2013-05-09T19:30:29Z
dc.date.issued 2009-03
dc.identifier.citation Hsiao, Esther Y, Schwartz, Myrna F., Schnur, Tatiana T, et al.. "Temporal characteristics of semantic perseverations induced by blocked-cyclic picture naming." Brain and Language, 108, no. 3 (2009) Elsevier: 133-143. http://dx.doi.org/10.1016/j.bandl.2008.11.003.
dc.identifier.urihttps://hdl.handle.net/1911/71106
dc.description.abstract When unimpaired participants name pictures quickly, they produce many perseverations that bear a semantic relation to the target, especially when the pictures are blocked by category. Evidence suggests that the temporal properties of these "semantic perseverations" may differ from typical lexical perseverations in aphasia. To explore this, we studied semantic perseverations generated by participants with aphasia on a naming task with semantic blocking [Schnur, T. T., Schwartz, M. F., Brecher, A., & Hodgson, C. (2006). Semantic interference during blocked-cyclic naming: Evidence from aphasia. Journal of Memory and Language, 54, 199-227]. The properties of these perseverations were investigated by analyzing how often they occurred at each lag (distance from prior occurrence) and how time (response-stimulus interval) influenced the lag function. Chance data sets were created by reshuffling stimulus-response pairs in a manner that preserved unique features of the blocking design. We found that the semantic blocking manipulation did not eliminate the expected bias for short-lag perseverations (recency bias). However, immediate (lag 1) perseverations were not invariably the most frequent, which hints at a source of inconsistency within and across studies. Importantly, there was not a reliable difference between the lag functions for perseverations generated with a 5 s, compared to 1 s, responsestimulus interval. The combination of recency bias and insensitivity to elapsed time indicates that the perseveratory impetus in a named response does not passively decay with time but rather is diminished by interference from related trials. We offer an incremental learning account of these findings.
dc.language.iso eng
dc.publisher Elsevier
dc.rights This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Elsevier.
dc.title Temporal characteristics of semantic perseverations induced by blocked-cyclic picture naming
dc.type Journal article
dc.citation.journalTitle Brain and Language
dc.subject.keywordperseveration
semantic blocking
aphasia
naming
priming
incremental learning
dc.citation.volumeNumber 108
dc.citation.issueNumber 3
dc.embargo.terms none
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1016/j.bandl.2008.11.003
dc.identifier.pmcid PMC2642906
dc.identifier.pmid 19138794
dc.type.publication post-print
dc.citation.firstpage 133
dc.citation.lastpage 143


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