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M.J. Reed; The Effect of Age on the Detection of Direction in Multiple Sources of Motion . Invest. Ophthalmol. Vis. Sci. 2006;47(13):5348.
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Deficits of motion perception have been reported for older adults. Here we examine the effects of attention and aging on the detection of direction in multiple sources of motion.
Twenty younger and twenty older subjects were asked to view multiple sources of motion which varied in set size (three to eight). Subjects were asked to indicate the number of rightward moving targets within the display set.
Younger subjects more often correctly identified the direction motion (number of rightward moving targets) than did older subjects. However, there was a significant decrease, for all subjects, in the number of trials where subjects correctly identified the rightward motion as set size increased and older and younger subjects were equally effected by the increasing demands of moving from a three dot display to an eight dot display.
We suggest that deficits of motion direction with multiple targets in older adults may result from reductions in general processing with age.
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