Such responses help people reach their goals. 2011 Franklin and Wolpert 2008 Brenner et al. 2008) and if there is less time to adjust to the change (Liu and Todorov 2007 Oostwoud Wijdenes et al. The response is more vigorous if a change in target position is larger (Brenner and Smeets 1997 Veerman et al. 1986 Prablanc and Martin 1992 Brenner and Smeets 1997 Day and Lyon 2000 Gritsenko et al. This method has be used to show that people respond quickly to changes in several attributes of a target including its position (e.g. ![]() This is often studied by changing visual information when the movement has already started. There is abundant evidence that people use many aspects of visual information to guide their goal-directed movements. Thus, the response to background motion and that to a target displacement are clearly not identical, but they do share several features. If the background was already moving before the target appeared, the hand even moved in the opposite direction. The response to a second epoch of background motion was smaller than it would have been if there had been no first epoch, in contrast to responses to multiple target displacements. ![]() The response to abrupt background motion was larger when the background moved later in the movement and when the background moved faster, in line with known responses to target displacements. At various times during the hand’s movement, the background could move briefly at one of several speeds, and for various durations. ![]() To find out whether this is the case, we ran two exploratory studies where we asked participants to hit a moving target at a specified moment. Does background motion simply change the position towards which the movement is guided? If so, the response to background motion should resemble the response to a target displacement. This response resembles that of a shift in the target’s position. When making a goal-directed movement towards a target, our hand follows abrupt background motion.
0 Comments
Leave a Reply. |