MacLeod S, Martin W L
Percept Mot Skills. 1978 Feb;46(1):251-61. doi: 10.2466/pms.1978.46.1.251.
Fitts' law was investigated in a study of the effect of the index of difficulty (ID) and intertapping interval upon reaction time (RT) and movement time (MT) for a reciprocal tapping task. ID showed its well-established relationship with MT as described by Fitts' law: MT = aID + b. Improvement in the linearity of this relationship was, however, demonstrated by expressing MT in logarithmic units. While ID had an unsubstantial (though significant) effect on RT, increases in intertapping interval from zero to any level of discrete tapping led to significant increases in RT of about 135 msec. The results are interpreted as lending support to Fitts' thesis that RT and MT reflect independent phases of information processing.
在一项关于互敲任务中难度指数（ID）和敲击间隔对反应时间（RT）及运动时间（MT）影响的研究中，对菲茨定律进行了调查。如菲茨定律所述，ID与MT呈现出其已确立的关系：MT = aID + b。然而，通过以对数单位表示MT，证明了这种关系的线性得到了改善。虽然ID对RT有不显著（尽管有统计学意义）的影响，但敲击间隔从零增加到任何离散敲击水平都会导致RT显著增加约135毫秒。这些结果被解释为支持了菲茨的论点，即RT和MT反映了信息处理的独立阶段。
