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  The posterior contralateral negativity as a temporal indicator of visuo-spatial processing

Wolber, M., & Wascher, E. (2005). The posterior contralateral negativity as a temporal indicator of visuo-spatial processing. Journal of Psychophysiology, 19(3), 182-194. doi:10.1027/0269-8803.19.3.182.

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 Creators:
Wolber, Maren1, Author              
Wascher, Edmund1, Author              
Affiliations:
1Max Planck Research Group Cognitive Psychophysiology of Action, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634565              

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Free keywords: Visuo-spatial processing; Spatial attention; Event-related potential; N2pc; PCN
 Abstract: The temporal segmentation of the processing stream between stimulus and response is a declared aim of many EEG-studies on cognitive processing. This goal, however, can only be reached when measures of high temporal sensitivity are available that are unequivocally assigned to a particular cognitive process. The present study evaluates the peak latency of the posterior contralateral negativity (PCN) as a temporal measure of visual spatial processing. In three experiments, we show systematic variability of the PCN latency with task demands. In visual search, PCN latency varied in the same direction as response times with the number of distractors. These effects, however, were smaller than the effects observed on response times, indicating that the process underlying the PCN might contribute to but did not determine response time effects. In contrast, in attentional cueing tasks and a stimulus localization task, where stimulus detection was the primarily addressed process, PCN latency varied to the same amount as manual response times. Thus, it is suggested that the latency of the PCN provides a reliable and valid temporal measure of target localization.

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 Dates: 2005
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 277947
Other: P5439
DOI: 10.1027/0269-8803.19.3.182
 Degree: -

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Title: Journal of Psychophysiology
Source Genre: Journal
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Publ. Info: Göttingen, Germany : American Psychological Association (PsycARTICLES)
Pages: - Volume / Issue: 19 (3) Sequence Number: - Start / End Page: 182 - 194 Identifier: ISSN: 0269-8803
CoNE: https://pure.mpg.de/cone/journals/resource/954928554373