Thomassen A J, Meulenbroek R G
Nijmegen Institute for Cognition and Information (NICI), University of Nijmegen, The Netherlands.
Acta Psychol (Amst). 1998 Nov;100(1-2):133-44. doi: 10.1016/s0001-6918(98)00030-4.
The paper addresses the question how the effector segments are coordinated during handwriting, in particular as a function of the left-to-right progression within words. It studies the phase relations between wrist and finger-joint rotations during a repetitive graphic task (long words consisting of letters 'e'), and it subjects the resulting continuous phase-relation plots to autocorrelation analysis. A novel phenomenon, viz. that of low-frequency (1-Hz) periodicity, is observed which presumably reflects adjustments of the coordination pattern about once per second, i.e., after every three or four letters 'e'. Moreover, word length and word position are found to affect this periodicity in a predictable manner. These results are related to those of an earlier study which used an ad-hoc method of analysing wrist-finger coordination adjustments. The paper underlines the value of phase-relation analysis for certain graphic tasks, but it also points out its limitations for this purpose.
本文探讨了在书写过程中效应器部分是如何协调的问题，特别是作为单词内从左到右书写顺序的函数。它研究了在一项重复性图形任务（由字母“e”组成的长单词）中手腕和手指关节旋转之间的相位关系，并对得到的连续相位关系图进行自相关分析。观察到一种新现象，即低频（1赫兹）周期性现象，这可能反映了协调模式大约每秒调整一次，即每三到四个字母“e”之后调整一次。此外，发现单词长度和单词位置以可预测的方式影响这种周期性。这些结果与早期一项研究的结果相关，该研究使用了一种临时方法来分析手腕与手指的协调调整。本文强调了相位关系分析对于某些图形任务的价值，但也指出了其在此目的上的局限性。
