Interference from object part relations in spoken word production: behavioural and fMRI evidence

Vieth, H. E., McMahon, K. L., Cunnington, R. and de Zubicaray, G. I. (2015) Interference from object part relations in spoken word production: behavioural and fMRI evidence. Journal of Neurolinguistics, 36 56-71. doi:10.1016/j.jneuroling.2015.05.002

Author Vieth, H. E.
McMahon, K. L.
Cunnington, R.
de Zubicaray, G. I.
Title Interference from object part relations in spoken word production: behavioural and fMRI evidence
Journal name Journal of Neurolinguistics   Check publisher's open access policy
ISSN 0911-6044
Publication date 2015-11-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jneuroling.2015.05.002
Open Access Status Not Open Access
Volume 36
Start page 56
End page 71
Total pages 16
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Formatted abstract
Objects presented in categorically related contexts are typically named slower than objects presented in unrelated contexts, a phenomenon termed semantic interference. However, not all semantic relationships induce interference. In the present study, we investigated the influence of object part-relations in the blocked cyclic naming paradigm. In Experiment 1 we established that an object's parts do induce a semantic interference effect when named in context compared to unrelated parts (e.g., leaf, root, nut, bark; for tree). In Experiment 2) we replicated the effect during perfusion functional magnetic resonance imaging (fMRI) to identify the cerebral regions involved. The interference effect was associated with significant perfusion signal increases in the hippocampal formation and decreases in the dorsolateral prefrontal cortex. We failed to observe significant perfusion signal changes in the left lateral temporal lobe, a region that shows reliable activity for interference effects induced by categorical relations in the same paradigm and is proposed to mediate lexical-semantic processing.  We interpret these results as supporting recent explanations of semantic interference in blocked cyclic naming that implicate working memory mechanisms. However, given the failure to observe significant perfusion signal changes in the left temporal lobe, the results provide only partial support for accounts that assume semantic interference in this paradigm arises solely due to lexical-level processes.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Thu, 11 Jun 2015, 02:05:49 EST by Lorine Wilkinson on behalf of Centre for Advanced Imaging