August 2014
Volume 14, Issue 10
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2014
The effect of age upon the perception of 3-D shape from motion
Author Affiliations
  • Jacob Cheeseman
    Department of Psychological Sciences, Ogden College of Science and Engineering, Western Kentucky University
  • J. Farley Norman
    Department of Psychological Sciences, Ogden College of Science and Engineering, Western Kentucky University
  • Jessica Pyles
    Department of Psychological Sciences, Ogden College of Science and Engineering, Western Kentucky University
  • Michael Baxter
    Department of Psychological Sciences, Ogden College of Science and Engineering, Western Kentucky University
  • Kelsey Thomason
    Department of Psychological Sciences, Ogden College of Science and Engineering, Western Kentucky University
  • Autum Calloway
    Department of Psychological Sciences, Ogden College of Science and Engineering, Western Kentucky University
Journal of Vision August 2014, Vol.14, 735. doi:10.1167/14.10.735
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      Jacob Cheeseman, J. Farley Norman, Jessica Pyles, Michael Baxter, Kelsey Thomason, Autum Calloway; The effect of age upon the perception of 3-D shape from motion. Journal of Vision 2014;14(10):735. doi: 10.1167/14.10.735.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

In previous research, we evaluated the ability of older, middle-aged, and younger adults to discriminate the 3-dimensional (3-D) shape of curved surfaces defined by optical motion. Temporal correspondence was disrupted by limiting the lifetimes of the moving surface points. It was found that in order to discriminate 3-D surface shape reliably, the younger and middle-aged adults needed a surface point lifetime of approximately 4 views (in the apparent motion sequences). In contrast, older adults needed a much longer surface point lifetime of approximately 9 views in order to reliably perform the same task. In the current experiment, the negative effect of age upon 3-D shape discrimination from motion was replicated. In this experiment, however, 20 younger and older participants' abilities to discriminate grating orientation and speed were also assessed. Edden et al. (2009) have recently demonstrated that behavioral grating orientation discrimination correlates with GABA (gamma aminobutyric acid) concentration in human visual cortex. Our current results demonstrate that the negative effect of age upon 3-D shape perception from motion is not caused by impairments in the ability to perceive motion per se, but does correlate significantly with grating orientation discrimination. This finding suggests that the age-related decline in 3-D shape discrimination from motion is related to decline in GABA concentration in visual cortex.

Meeting abstract presented at VSS 2014

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