Sherwood D E, Sullivan A
Department of Kinesiology and Applied Physiology, University of Colorado, USA.
Res Q Exerc Sport. 1999 Sep;70(3):252-64. doi: 10.1080/02701367.1999.10608044.
This study verified earlier anecdotal evidence indicating that spatial assimilations could be reduced by offsetting movements in time. In Experiment 1, 40 right-handed participants (ages 18-23 years) made single and dual quick lever reversals of 20 degrees and 60 degrees with the left and right limbs, respectively. Participants were assigned to either the Overlapping (O) group, in which one limb began when the other limb reached the reversal point, or to the Sequential (S) group in which one limb followed the other with a delay of 114 ms, on average. The shorter-distance limb of the O group overshot relative to the S group. Short-distance spatial assimilations were also shown in the S group in Experiment 2, when the delay was increased to 250, 500, or 1,500 ms (N = 30), suggesting that assimilation effects can be caused by command interactions at both the planning and the execution levels.
本研究验证了早期的轶事证据，这些证据表明，空间同化可以通过在时间上抵消动作来减少。在实验1中，40名右利手参与者（年龄在18至23岁之间）分别用左、右肢体进行了20度和60度的单次和双次快速杠杆反转动作。参与者被分配到重叠（O）组或顺序（S）组，在重叠组中，一个肢体在另一个肢体到达反转点时开始动作，而在顺序组中，一个肢体平均延迟114毫秒跟随另一个肢体动作。与S组相比，O组中移动距离较短的肢体出现了超调。在实验2中，当延迟增加到250、500或1500毫秒时（N = 30），S组也出现了短距离空间同化现象，这表明同化效应可能是由计划和执行层面的指令交互作用引起的。
