Research article summary:

On the dissociation between clustering and switching in verbal fluency: comment on Troyer, Moscovitch, Winocur, Alexander and Stuss.

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Troyer, Moscovitch, Winocur, Alexander and Stuss (Neuropsychologia 36 (1998) 499) used a procedure originally introduced by Troyer, Moscovitch and Winocur (Neuropsychology 11 (1997) 138) for distinguishing two different components of verbal ... (Full abstract text below)

Published 2002 in Journal: Neuropsychologia (Language : eng)

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1. Neuropsychologia. 2002 ;40(5):562-6

On the dissociation between clustering and switching in verbal fluency: comment on Troyer, Moscovitch, Winocur, Alexander and Stuss.

Mayr U

Department of Psychology, University of Oregon, Eugene, OR 97403, USA. mayr@oregon.uoregon.edu

Troyer, Moscovitch, Winocur, Alexander and Stuss (Neuropsychologia 36 (1998) 499) used a procedure originally introduced by Troyer, Moscovitch and Winocur (Neuropsychology 11 (1997) 138) for distinguishing two different components of verbal fluency-clustering and switching-in frontal and temporal-lobe patients. Application of this procedure yielded results that suggested a frontal-lobe switching deficit, but intact 'clustering'. I demonstrate here that the proposed procedure may lead to incorrect conclusions because it does not allow an unambiguous dissociation between a general reduction in processing speed and a selective switching deficit. Some implications of this critique for inferences about the neurocognitive components involved in verbal fluency tasks are discussed.

PMID : 11749985 [PubMed - Indexed for MEDLINE]

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First Name	LastName	Initials
Ulrich	Mayr	U

Affiliation: Department of Psychology, University of Oregon, Eugene, OR 97403, USA. mayr@oregon.uoregon.edu

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