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Hierarchical processing and level-repetition effect as indexed by early brain potentials

Published online by Cambridge University Press:  15 December 2000

SHIHUI HAN ,
XUN HE  and
DAVID L. WOODS
SHIHUI HAN
Affiliation:
Beijing Lab of Cognitive Science, University of Science and Technology of China Department of Neurology, University of California at Davis, Veterans Administration Northern California System of Clinics, Martinez, USA
XUN HE
Affiliation:
Beijing Lab of Cognitive Science, University of Science and Technology of China
DAVID L. WOODS
Affiliation:
Department of Neurology, University of California at Davis, Veterans Administration Northern California System of Clinics, Martinez, USA
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Abstract

Event-related potentials were recorded to investigate the mechanisms of hierarchical processing and level-repetition effect. Participants identified targets that appeared at global, local, or both levels of hierarchical patterns. Reaction times showed global precedence and level-repetition effects. An occipital P1 wave was enhanced to local relative to global targets. The P1 to local targets was also larger when preceded by global than local targets. Global and both-level target selections were indexed by two posterior negativities peaking at 130 and 190 ms poststimulus, whereas local target selection was indexed by a broad occipitotemporal negativity. A late selection positivity was observed over the left occipitotemporal site for global targets but over the central site for local targets. The findings suggest that sensory-perceptual mechanisms contribute to global precedence and level-repetition effects in hierarchical processing.

Keywords

ERPsHierarchical processingLevel-repetition effectGlobal precedenceGrouping
Type
Research Article
Information
Psychophysiology , Volume 37 , Issue 6 , November 2000 , pp. 817 - 830
Copyright
2000 Society for Psychophysiological Research

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