Saccadic suppression of displacement and adaptation: flip sides of a coin? T Collins |
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Laboratoire Psychologie de la Perception, Université Paris Descartes, France
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| When a visual target is displaced during the saccade towards it, the displacement is often not perceived, a phenomenon known as saccadic suppression of displacement. However, such displacements cause saccadic adaptation: the amplitude of the following saccade corrects for some of the (artificial) error of the previous trial. Suppression and displacement have often been studied independently, although both are measured by the in-flight target displacement task. In the present experiment, both effects were measured concurrently. Preliminary results show that adaptation correlates with suppression on a trial-by-trial basis. These results suggest that future behavior is adapted only when the cause of previous inadequate behavior is attributed to a movement error, not when it is attributed to a change in the outside world. |
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