Fig. 1.

Schematic overview of the experiment. a The participant holds a pen at the starting position when a target (dark square in this example) and two other objects (references, the brighter squares in this example) appeared. b In half of the trials, the target switches to one of the other locations just after movement onset. c Ten paths of one participant’s hand (P6) for a target that remained at the leftmost position in the “luminance (390%)” condition. d All ten paths of the same participant’s hand in the condition in which the target jumped from the leftmost to the rightmost position at movement onset