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From: "Vision Research" <>
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Subject: Age, eye movement and motion discrimination.
Date: Fri, 20 Aug 2010 00:00:00 +0200
Authors: O'Connor E, Margrain TH, Freeman TC Age is known to affect sensitivity to retinal motion. However, little is known about how age might affect sensitivity to motion during pursuit. We therefore investigated direction discrimination and speed discrimination when moving stimuli were either fixated or pursued. Our experiments showed: 1) age influences direction discrimination at slow speeds but has little affect on speed discrimination; 2) the faster eye movements made in the pursuit conditions produced poorer direction discrimination at slower speeds, and poorer speed discrimination at all speeds; 3) regardless of eye movement condition, observers always combined retinal and extra-retinal motion signals to make their judgements. Our results support the idea that performance in th...
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