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Does aging affect the allocation of visual attention in global and local information processing?

Authors
  • Roux, F
  • Ceccaldi, M
Type
Published Article
Journal
Brain and cognition
Publication Date
Aug 01, 2001
Volume
46
Issue
3
Pages
383–396
Identifiers
PMID: 11487288
Source
Medline
License
Unknown

Abstract

The earliest studies of Navon (1977) showed that in certain conditions the visual perception of hierarchical stimuli generates a global precedence effect. This hypothesis is based on the joint occurrence of two effects: a response time (RT) advantage for identifying global targets and interference by global distractors when responding to a local target. The aim of the present study was to determine the involvement of attentional mechanisms and whether certain aspects are specifically altered by normal aging. In a selective-attention task, a complete global precedence effect was found for young and old subjects. However, for the old subjects, global interference on local identification was more pronounced than for the young subjects. In a divided-attention task, the RT advantage was affected by attention shifts between global and local forms for both young and old subjects, but the global interference effect did not change.

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