TARGET SPEED ALONE INFLUENCES THE LATENCY AND TEMPORAL ACCURACY OF INTERCEPTIVE ACTION

When intercepting a mobile object or an apparent movement, participant s show a temporal bias. They are in advance when dealing with a slow-m oving stimulus and late with a fast-moving one. We studied participant s intercepting an apparent movement by sliding a disk on a table. Usin g a fast and a slow stimulus speed, we varied three factors: duration of presentation of the stimulus, distance covered by the stimulus, and speed context (constant or varied) of stimulus presentation. In addit ion to the temporal bias, spatial accuracy and cinematic measures were collected. The temporal bias created by speed was evident across all three factors. Speed, in addition to strongly determining the temporal bias, significantly affected the throwing strategy adopted by the par ticipants, as revealed by latency, movement time, and disk trajectory duration.