Vainio Lari
Department of Psychology, University of Helsinki, Finland.
J Mot Behav. 2009 Jul;41(4):305-15. doi: 10.3200/JMBR.41.4.305-316.
The author investigated how the motor program elicited by an object's orientation is updated by object-based information while a participant reaches for the object. Participants selected the hand of response according to the thickness of the graspable object and then reached toward the location in which the object appeared. Reach initiation times decreased when the handle of the object was oriented toward the responding hand. This positive compatibility effect turned into a negative compatibility effect (NCE) during reach execution when the object was removed from the display 300 ms after object onset or replaced with a mask at movement onset. The results demonstrate that interrupted object-based updating of an ongoing reach movement triggers the NCE.
作者研究了在参与者伸手去拿物体时，由物体方向引发的运动程序是如何通过基于物体的信息进行更新的。参与者根据可抓握物体的厚度选择反应手，然后朝着物体出现的位置伸手。当物体的手柄朝向反应手时，伸手起始时间会缩短。当物体在出现后300毫秒从显示屏上移除，或者在运动开始时被一个掩蔽物取代时，这种积极的兼容性效应在伸手执行过程中会转变为消极的兼容性效应（NCE）。结果表明，正在进行的伸手动作中基于物体的更新被打断会触发NCE。
