Sidaway B, Schoenfelder-Zohdi B, Moore B
Department of Kinesiology, Louisiana State University, Baton Rouge 70803-7101.
Psychol Res. 1990;52(4):359-65. doi: 10.1007/BF00868068.
This study varied the accuracy demand within a linear series of targets to investigate the effect of movement-pathway constraints on response-programming time. Sidaway, Christina, and Shea (1988) have suggested that constraints placed upon movement initiation by the demand for response precision may play an important role in determining the length of the programming process. By varying the subtended angles of a series of three targets, this experiment tested the specific prediction of Sidaway et al. that programming time may be a function of the target, within a line of targets, that subtends the smallest angle at the start position. It is this target that demands the greatest precision in the movement pathway. Subjects participated in a series of conditions in which the size and placement of the target that imposed the maximal constraint was varied. In each condition the subjects were required to strike a series of three targets with a stylus in a simple reaction-time paradigm. Analysis of the reaction-time results revealed a significant effect of size of constraint, but no effect of position of constraint. Analysis of the movement-time data dispelled movement-duration and movement-velocity interpretations of the results and intimated a possible online trajectory-correction process.
本研究在一系列线性排列的目标中改变准确性要求，以探究运动路径限制对反应编程时间的影响。西达韦、克里斯蒂娜和谢伊（1988年）提出，反应精度要求对运动起始施加的限制可能在决定编程过程的时长方面发挥重要作用。通过改变一系列三个目标所对的角度，本实验检验了西达韦等人的具体预测，即在一排目标中，编程时间可能是起始位置所对角度最小的目标的函数。正是这个目标对运动路径要求最高的精度。受试者参与了一系列条件实验，其中施加最大限制的目标的大小和位置有所变化。在每个条件下，要求受试者在简单反应时范式中用触笔击中一系列三个目标。对反应时结果的分析显示出限制大小的显著影响，但没有限制位置的影响。对运动时间数据的分析排除了对结果的运动持续时间和运动速度解释，并暗示了可能的在线轨迹校正过程。
