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A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance

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Is coarse-to-fine strategy sensitive to normal aging?

Benoit Musel¹, Alan Chauvin, Nathalie Guyader

¹Laboratoire de Psychologie et NeuroCognition, CNRS - UMR 5105, Université Pierre Mendès France, Grenoble, France. benoit.musel@upmf-grenoble.fr

|June 8, 2012

Summary

Visual recognition processing typically moves from general to specific details. This study shows that while aging affects this coarse-to-fine sequence, older adults can still effectively categorize scenes using this method.

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Area of Science:

Visual perception research
Cognitive neuroscience
Aging studies

Background:

Visual recognition theories propose a coarse-to-fine processing sequence, starting with global analysis and progressing to detailed analysis.
Neurophysiological, computational, and behavioral studies support this coarse-to-fine (CtF) information processing, prioritizing low spatial frequencies before high ones.
The impact of normal aging on this established visual processing sequence requires further investigation.

Purpose of the Study:

To investigate whether the coarse-to-fine (CtF) visual processing sequence is maintained in normally aging individuals.
To compare the efficiency of CtF versus fine-to-coarse (FtC) processing in young and aged participants.
To examine the interaction between visual processing sequence and semantic categorization in different age groups.

Main Methods:

Participants (young and aged) performed a scene categorization task (indoor vs. outdoor).
Dynamic natural scene stimuli were presented using either a coarse-to-fine (CtF) or fine-to-coarse (FtC) sequence.
Response times and categorization accuracy were measured for each sequence type and age group.

Main Results:

Young participants demonstrated faster categorization with CtF sequences compared to FtC sequences.
Aged participants showed an interaction between sequence processing and semantic category, unlike younger adults.
The effectiveness of CtF categorization was confirmed in aged participants, though influenced by scene spatial features.

Conclusions:

The coarse-to-fine (CtF) visual processing strategy remains effective in normally aging individuals.
Aging introduces constraints on CtF categorization, particularly concerning the spatial features of visual scenes.
Findings offer new insights into visual perception models and the effects of aging on visual cognition.