This paper is an extended version of a previous paper [1] published at ICAT-EGVE 2020. We explored the potential impact of threat occurrence and repeatability on users’ Sense of Embodiment (SoE) and threat response. To that aim, we conducted an experiment in which participants were embodied in a virtual avatar, and performed a task in which a threat towards the virtual body was introduced a first time, then repeated several times through the experiment (in total 5 times). The SoE of participants as well as their subjective response to the threat were assessed through subjective questionnaires before the introduction of the threat, after a first introduction of the threat and at the end of the experiment. A control group did the same experiment with no threat introduced during the task. The main findings of our experiment are that the introduction of a threat does not alter users’ SoE but might change their behaviour while performing a task after the threat occurrence. In addition, threat repetitions did not show any effect on users’ subjective SoE, or subjective and objective responses to threat. Taken together, our results suggest that embodiment studies should expect potential change in participants behaviour while doing a task after a threat was introduced, but that threat introduction and repetition do not seem to impact the subjective measure of the SoE (subective ratings) nor the objective measure of the SoE (physical reaction to threat).

这篇论文是之前在 ICAT-EGVE 2020 上发表的论文 [1] 的扩展版本。我们探讨了威胁发生和可重复性对用户的实施感 (SoE) 和威胁响应的潜在影响。为此，我们进行了一项实验，其中参与者被体现在虚拟化身中，并执行一项任务，其中第一次引入对虚拟身体的威胁，然后在整个实验中重复多次（总共 5 次）。在引入威胁之前、首次引入威胁之后和实验结束时，通过主观问卷评估参与者的 SoE 以及他们对威胁的主观反应。对照组在任务期间没有引入威胁的情况下进行了相同的实验。我们实验的主要发现是，引入威胁不会改变用户的 SoE，但可能会改变他们在威胁发生后执行任务时的行为。此外，威胁重复对用户的主观 SoE 或对威胁的主观和客观反应没有任何影响。综上所述，我们的结果表明，在引入威胁后，实施研究应该预期参与者在执行任务时行为的潜在变化，但威胁的引入和重复似乎不会影响 SoE（主观评价）的主观测量，也不会影响客观SoE（对威胁的物理反应）的度量。威胁重复对用户的主观 SoE 或对威胁的主观和客观反应没有显示任何影响。综上所述，我们的结果表明，在引入威胁后，实施研究应该预期参与者在执行任务时行为的潜在变化，但威胁的引入和重复似乎不会影响 SoE（主观评价）的主观测量，也不会影响客观SoE（对威胁的物理反应）的度量。威胁重复对用户的主观 SoE 或对威胁的主观和客观反应没有显示任何影响。综上所述，我们的结果表明，在引入威胁后，实施研究应该预期参与者在执行任务时行为的潜在变化，但威胁的引入和重复似乎不会影响 SoE（主观评价）的主观测量，也不会影响客观SoE（对威胁的物理反应）的度量。