In line with the theory of event coding, many studies on tool use show that perceived visual and haptic information interacts with action execution. In two experiments, we investigated the temporal persistence of after-effects within an event file, and after-effects in temporally overlapping event files with the n-1 replication task. Each trial consisted of two phases: In phase 1, participants moved a cursor with a pen on a covered tablet while a gain varied the relation between hand and cursor amplitude (Experiment 1). In phase 2, participants replicated the hand amplitude of phase 1 of the previous trial without visual feedback. Any systematic over- and undershoot would be indicative for after-effects. When the cursor amplitude varied and the hand amplitude remained constant, we did not find any after-effects but adjustment of the internal model. For varying hand amplitudes, after-effects appeared in terms of a contrast and assimilation effect between temporally overlapping event files and within an event file, respectively. In Experiment 2, we confirmed that the observed pattern of over- and undershoots fully reflect assimilation/contrast due to perception-action interaction. The findings extend the current view on the temporal stability of short-term binding in sensorimotor transformation tasks: In the n-1 replication task, after-effects appeared only in trials with varying hand amplitudes. We replicated the contrast effect and assimilation effect, and the assimilation effect persisted for up to approximately 20 s.

根据事件编码的理论，许多关于工具使用的研究表明，感知到的视觉和触觉信息与动作执行相互影响。在两个实验中，我们研究了事件文件中后效的时间持久性，以及时间重叠的事件文件中n-1的后效复制任务。每个试验包括两个阶段：在阶段1中，参与者使用笔在覆盖的数位板上移动光标，同时增益改变了手和光标幅度之间的关系（实验1）。在阶段2中，参与者复制了先前试验的阶段1的手幅度，而没有视觉反馈。任何系统的过冲和下冲都将指示后效应。当光标幅度变化且手幅度保持恒定时，我们没有发现任何后效，而是调整了内部模型。对于不同的手幅，在对比和同化效果方面会出现后效在时间上重叠的事件文件之间和在事件文件内。在实验2中，我们确认观察到的上冲和下冲模式完全反映了由于感知行为相互作用而引起的同化/对比度。这些发现扩展了当前关于感觉运动转换任务中短期结合的时间稳定性的观点：在n-1复制任务中，后效应仅出现在具有不同手幅的试验中。我们复制了对比效果和同化效果，并且同化效果持续了大约20 s。