Is Coarse-to-Fine Strategy Sensitive to Normal Aging?

Theories on visual perception agree that visual recognition begins with global analysis and ends with detailed analysis. Different results from neurophysiological, computational, and behavioral studies all indicate that the totality of visual information is not immediately conveyed, but that informa...

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Vydáno v:PloS one Ročník 7; číslo 6; s. e38493
Hlavní autoři: Musel, Benoit, Chauvin, Alan, Guyader, Nathalie, Chokron, Sylvie, Peyrin, Carole
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States Public Library of Science 04.06.2012
Public Library of Science (PLoS)
Témata:
Adolescent
Age
Aging
Aging (natural)
Aging - physiology
Analysis
Archives & records
Biology
Classification
Clinical trials
Cognitive science
Computational neuroscience
Data analysis
Epidemiology
Female
Frailty
Geriatrics
Humans
Information management
Information processing
Macular degeneration
Male
Medicine
Neurophysiology
Occupational therapy
Older people
Photic Stimulation
Psychology
Reaction Time - physiology
Semantics
Social and Behavioral Sciences
Studies
Visual perception
Visual Perception - physiology
Young Adult
ISSN:1932-6203, 1932-6203
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Popis
Shrnutí:Theories on visual perception agree that visual recognition begins with global analysis and ends with detailed analysis. Different results from neurophysiological, computational, and behavioral studies all indicate that the totality of visual information is not immediately conveyed, but that information analysis follows a predominantly coarse-to-fine processing sequence (low spatial frequencies are extracted first, followed by high spatial frequencies). We tested whether such processing continues to occur in normally aging subjects. Young and aged participants performed a categorization task (indoor vs. outdoor scenes), using dynamic natural scene stimuli, in which they resorted to either a coarse-to-fine (CtF) sequence or a reverse fine-to-coarse sequence (FtC). The results show that young participants categorized CtF sequences more quickly than FtC sequences. However, sequence processing interacts with semantic category only for aged participants. The present data support the notion that CtF categorization is effective even in aged participants, but is constrained by the spatial features of the scenes, thus highlighting new perspectives in visual models.
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Conceived and designed the experiments: BM CP AC NG. Performed the experiments: BM. Analyzed the data: BM. Contributed reagents/materials/analysis tools: BM CP AC NG. Wrote the paper: BM CP SC.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0038493