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Spatial biases in motion extrapolation for manual interception
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Description: This study examines the control of manual interception, for a range of target trajectories, using visual occlusion. We show that occlusion causes spatial biases in the movements because unseen target motion is not fully accounted for. Participants quite accurately intercepted targets moving on straight trajectories and targets continuously visible; spatial biases arose, however, when unseen target motion must be accounted for. Because these effects were present irrespective of the time pressure inherent to manual interception, we interpret these to originate from target information used to control where to move rather than how fast to move. This research has implications in sports training, suggesting that the usefulness of visual occlusion training may be dependent on exactly how occluded objects are moving.