Category-Specific Visual Recognition and Aging from the PACE Theory Perspective: Evidence for a Presemantic Deficit in Aging Object Recognition.

Unlabelled: Background/Study Context: The objective of this study was to investigate the object recognition deficit in aging. Age-related declines were examined from the presemantic account of category effects (PACE) theory perspective (Gerlach, 2009, Cognition, 111, 281-301). This view assumes that the structural similarity/dissimilarity inherent in living and nonliving objects, respectively, can account for a wide range of category-specific effects.

Does a yellow filter improve visual object categorization in normal aging?

Previous studies have shown that a yellow filter (CPF450) can increase contrast, motion sensitivity, vergence, and accommodation. We investigated whether a yellow filter can reduce age-related visual deficits. We tested two groups of 60 observers (mean age 24 vs.

Influence of visual deficits on object categorization in normal aging.

Unlabelled: BACKGROUND/STUDY CONTEXT: The authors assessed whether age-related changes in low-level vision affects higher-level processes involved in object categorization.

Methods: Thirty young and 30 older observers were asked to categorize gray levels photographs of natural and artifactual objects. The authors manipulated contrast (8% vs.

[Aging of visual object recognition: interaction between a "spatial frequency-specific" deficit and a "category-specific" deficit].

The study investigated the aging of object categorization manipulating the spatial frequency (SF) content in photographs of object and the object category. Thirty young (m=22 years old) and 24 mature adults (m=57 years old) categorized 120 items (animals/tools) presented for 200 ms each, in one of three versions: a normal version (no filter), a band-pass filtered version (medium to high SF) and a low-pass filtered version (low SF). Results showed that this categorization task relied mainly on the medium to high SF band and that the mature group had a large impairment on that band.