When humans indicate on which hand a tactile stimulus occurred, they often err when their hands are crossed. This finding seemingly supports the view that the automatically determined touch location in external space affects limb assignment: the crossed right hand is localized in left space, and this conflict presumably provokes hand assignment errors. Here, participants judged on which hand the first of two stimuli, presented during a bimanual movement, had occurred, and then indicated its external location by a reach-to-point movement. When participants incorrectly chose the hand stimulated second, they pointed to where that hand had been at the correct, first time point, though no stimulus had occurred at that location. This behavior suggests that stimulus localization depended on hand assignment, not vice versa. It is, thus, incompatible with the notion of automatic computation of external stimulus location upon occurrence. Instead, humans construct external touch location post-hoc and on demand.

中文翻译：

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基于肢体选择的事后构建触摸的外部位置

当人类指出触觉刺激发生在哪只手上时，他们的双手交叉时通常会出错。这一发现似乎支持了外部空间中自动确定的触摸位置影响肢体分配的观点：交叉的右手定位在左侧空间中，这种冲突可能会引起手部分配错误。在这里，参与者判断在双手运动期间呈现的两个刺激中的第一个发生在哪只手上，然后通过到达点运动指示其外部位置。当参与者错误地选择了第二次刺激的手时，他们会指出那只手在正确的第一个时间点所处的位置，尽管该位置没有发生刺激。这种行为表明刺激定位取决于手部分配，反之亦然。因此，它是 与在发生时自动计算外部刺激位置的概念不相容。相反，人类在事后和按需构建外部触摸位置。