ABSTRACT

The current experiment is part of an ongoing feasibility testing of grip force as a measure of stress in joystick-controlled tasks. In a previous study, we showed that grip force of one group was higher under a stress manipulation, and higher than of another group without stress manipulation. In the current experiment, we tested if we could identify greater grip force under stress, per individual. Fourteen participants performed tracking tasks in trials with and without a stress manipulation. We computed the mean grip force of each participant in several intervals to test how soon (if at all) his grip force in the trials with the stress manipulation had become significantly higher than in the trials without the stress manipulation. In ∼31% of the comparisons, we were able to detect higher grip force with than without the stress manipulation after 5 s through the trials. Other detections of greater grip force took longer, but no longer than 30 s. However, not all participants gripped significantly harder during the stress manipulation. The current experiment added support to the feasibility of using grip force as a measure of stress in joystick-controlled tasks and pointed to the next necessary steps in evaluating its feasibility.

摘要

当前的实验是正在进行的抓握力可行性测试的一部分，抓握力是控制杆控制任务中压力的一种度量。在先前的研究中，我们表明，在压力操作下，一组的握力更高，而在没有压力操作的情况下，另一组的握力更高。在当前的实验中，我们测试了是否可以确定每个人在压力下的抓地力更大。有或没有压力操纵的试验中，有十四名参与者执行了跟踪任务。我们计算了每个参与者在几个时间间隔内的平均握力，以测试在进行压力操作的试验中，其握力要比未进行压力操作的试验显着提高的时间（如果有的话）。在〜31％的比较中，在整个试验过程中，经过5 s的测试，与没有施加压力操作相比，我们能够检测到更高的抓地力。其他检测到更大握力的过程花费了更长的时间，但不超过30 s。但是，并不是所有的参与者在压力操纵过程中抓地力都明显更大。当前的实验为使用握力作为操纵杆控制任务中的压力度量的可行性提供了支持，并指出了评估其可行性的下一个必要步骤。