The spatial temporal structure of coincident timing responses was investigated using an 86-cm movement from a microswitch to a barrier. The speed of the movement was monitored by a series of photocells placed at equal intervals along the movement line. Subjects (N = 24) watched a timer and attempted to displace the barrier at the precise moment that the timer sweep-hand reached a “target position” (250, 500, 1000 msec.) All subjects were given 100 trials of practice at a particular target position. The results indicate that rapid responses have similar spatial temporal structures but that this pattern is altered in slower movements.