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Michael W Grunau, Landrew MacKinnon; Simultaneous monocular and binocular motion aftereffects for radial flowfield stimuli. Journal of Vision 2003;3(9):603. doi: 10.1167/3.9.603.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose. The motion aftereffect (MAE) and interocular transfer (IOT) can be used to probe the human visual system for characteristics and location of motion mechanisms. We used these techniques to measure direct and transfer MAEs with static and dynamic test stimuli. Methods. Adaptation stimuli were random dot expanding radial flowfields with acceleration, 100% coherence and infinite lifetime, viewed by one eye. Testing was either with the same eye (direct MAE) or with both eyes (binocular MAE) followed by viewing with the adapting eye (monocular MAE). The duration of the direct, binocular and monocular MAEs was measured for static and dynamic test stimuli. Results. For both static and dynamic testing, the binocular MAE was much shorter than the direct MAE. It was also shorter than the monocular MAE, which was measured immediately after the binocular MAE had disappeared. On average, the direct and monocular MAEs were about equal. These effects were more pronounced for dynamic testing. Dynamic MAEs were longer than static MAEs. Conclusions. The results indicate the existence of a monocular and a binocular MAE, which are fairly independent and occur simultaneously. Binocular testing can preserve the monocular (direct) MAE, which then appears delayed, but in full strength.
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