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Altering Automatic Verbal Processes with Transcranial Direct Current Stimulation

Overview of attention for article published in Frontiers in Psychiatry, January 2012
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Title
Altering Automatic Verbal Processes with Transcranial Direct Current Stimulation
Published in
Frontiers in Psychiatry, January 2012
DOI 10.3389/fpsyt.2012.00073
Pubmed ID
Authors

Tracy D. Vannorsdall, David J. Schretlen, Megan Andrejczuk, Kerry Ledoux, Laura V. Bosley, Jacqueline R. Weaver, Richard L. Skolasky, Barry Gordon

Abstract

Background: Word retrieval during verbal fluency tasks invokes both automatic and controlled cognitive processes. A distinction has been made between the generation of words clusters and switches between such clusters on verbal fluency tasks. Clusters, defined by the reporting of contiguous words that constitute semantic or phonemic subcategories, are thought to reflect relatively automatic processing. In contrast, switching from one subcategory to another is thought to require a more controlled, effortful form of cognitive processing. Objective: In this single-blind, sham-controlled experiment, we investigated whether anodal and cathodal transcranial direct current stimulation (tDCS) can differentially modify controlled or automatic processes that support lexical retrieval, as assessed by clustering and switching on verbal fluency tasks, in 24 healthy right-handed adults. Methods: Participants were randomly assigned to receive 1 mA of either anodal (excitatory) or cathodal (inhibitory) active tDCS over the left dorsolateral prefrontal cortex in addition to sham stimulation over the same region in counterbalanced order. Participants engaged in various cognitive activities during the first 23 min of stimulation. Then, during the final segment of each 30-min session, they completed letter- and category-cued word fluency tasks. Results: Participants reported more words on category-cued word fluency tasks during anodal than sham stimulation (25.9 vs. 23.0 words; p = 0.055). They also showed a net increase in the number of clustered words during anodal stimulation compared to a net decrease during cathodal stimulation (1.3 vs. -1.5 words; p = 0.038). Conclusion: tDCS can selectively alter automatic aspects of speeded lexical retrieval in a polarity-dependent fashion during a category-guided fluency task.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 76 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United Kingdom 1 1%
Italy 1 1%
Unknown 74 97%

Demographic breakdown

Readers by professional status Count As %
Researcher 17 22%
Student > Ph. D. Student 12 16%
Student > Master 12 16%
Student > Doctoral Student 5 7%
Student > Postgraduate 5 7%
Other 9 12%
Unknown 16 21%
Readers by discipline Count As %
Psychology 33 43%
Neuroscience 13 17%
Medicine and Dentistry 4 5%
Linguistics 3 4%
Sports and Recreations 1 1%
Other 3 4%
Unknown 19 25%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 06 August 2012.
All research outputs
#20,165,369
of 22,675,759 outputs
Outputs from Frontiers in Psychiatry
#7,598
of 9,789 outputs
Outputs of similar age
#221,176
of 244,088 outputs
Outputs of similar age from Frontiers in Psychiatry
#79
of 90 outputs
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