Task-dependent modulation of word processing mechanisms during modified visual search tasks

During visual search for words, the impact of the visual and semantic features of words varies as a function of the search task. This event-related potential (ERP) study focused on the way these features of words are used to detect similarities between the distractor words that are glanced at and th...

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Bibliographic Details
Published in:Quarterly journal of experimental psychology (2006) 2016-06, Vol.69 (6), p.1145-1163
Main Authors: Dampure, Julien, Benraiss, Abdelrhani, Vibert, Nicolas
Format: Article
Language:English
Subjects:
Adolescent
Adult
Analysis of Variance
Attention - physiology
Brain - physiology
Categorization
Cognitive science
Cognitive task-set
Electroencephalography
Electrooculography
Event-related potentials
Evoked Potentials, Visual - physiology
Eye Movements - physiology
Female
Humans
Male
Photic Stimulation
Psychology
Reaction Time - physiology
Semantics
Vocabulary
Word processing pathways
Young Adult
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Summary:During visual search for words, the impact of the visual and semantic features of words varies as a function of the search task. This event-related potential (ERP) study focused on the way these features of words are used to detect similarities between the distractor words that are glanced at and the target word, as well as to then reject the distractor words. The participants had to search for a target word that was either given literally or defined by a semantic clue among words presented sequentially. The distractor words included words that resembled the target and words that were semantically related to the target. The P2a component was the first component to be modulated by the visual and/or semantic similarity of distractors to the target word, and these modulations varied according to the task. The same held true for the later N300 and N400 components, which confirms that, depending on the task, distinct processing pathways were sensitized through attentional modulation. Hence, the process that matches what is perceived with the target acts during the first 200 ms after word presentation, and both early detection and late rejection processes of words depend on the search task and on the representation of the target stored in memory.
ISSN:1747-0218
1747-0226
DOI:10.1080/17470218.2015.1070886