Negative priming in naming of categorically related objects: An fMRI study

De Zubicaray, Greig I., McMahon, Katie L., Eastburn, Mathew M. and Pringle, Alan J. (2008) Negative priming in naming of categorically related objects: An fMRI study. Cortex, 44 7: 881-889. doi:10.1016/j.cortex.2007.02.005


Author De Zubicaray, Greig I.
McMahon, Katie L.
Eastburn, Mathew M.
Pringle, Alan J.
Title Negative priming in naming of categorically related objects: An fMRI study
Journal name Cortex   Check publisher's open access policy
ISSN 0010-9452
Publication date 2008-07-01
Year available 2008
Sub-type Article (original research)
DOI 10.1016/j.cortex.2007.02.005
Open Access Status Not yet assessed
Volume 44
Issue 7
Start page 881
End page 889
Total pages 9
Editor S. Della Sala
Place of publication Milano, Italy : Masson
Publisher Elsevier
Language eng
Subject C1
170101 Biological Psychology (Neuropsychology, Psychopharmacology, Physiological Psychology)
920111 Nervous System and Disorders
Abstract Ignoring an object slows subsequent naming responses to it, a phenomenon known as negative priming (NP). A central issue in NP research concerns the level of representation at which the effect occurs. As object naming is typically considered to involve access to abstract semantic representations, Tipper 1985 proposed that the NP effect occurred at this level of processing, and other researchers supported this proposal by demonstrating a similar result with categorically related objects (e.g., Allport et al., 1985; Murray, 1995), an effect referred to as semantic NP. However, objects within categories share more physical or structural features than objects from different categories. Consequently, the NP effect observed with categorically related objects might occur at a structural rather than semantic level of representation. We used event related fMRI interleaving overt object naming and image acquisition to demonstrate for the first time that the semantic NP effect activates the left posterior-mid fusiform and insular–opercular cortices. Moreover, both naming latencies and left posterior-mid fusiform cortex responses were influenced by the structural similarity of prime–probe object pairings in the categorically related condition, increasing with the number of shared features. None of the cerebral regions activated in a previous fMRI study of the identity NP effect (de Zubicaray et al., 2006) showed similar activation during semantic NP, including the left anterolateral temporal cortex, a region considered critical for semantic processing. The results suggest that the identity and semantic NP effects differ with respect to their neural mechanisms, and the label “semantic NP” might be a misnomer. We conclude that the effect is most likely the result of competition between structurally similar category exemplars that determines the efficiency of object name retrieval. Copyright © 2009 Elsevier Srl. All rights reserved
Keyword Semantics
Negative priming
fMRI
Object naming
Categories
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 02 Apr 2009, 23:00:40 EST by Lesley-Jayne Jerrard on behalf of Centre For Magnetic Resonance