Event Lab, Department of Clinical Psychology and Psychobiology, University of Barcelona, Barcelona, Spain.
PLoS One. 2018 Nov 5;13(11):e0203358. doi: 10.1371/journal.pone.0203358. eCollection 2018.
Mortality is an obvious if uncomfortable part of the human condition, yet it is impossible to study its impact on anyone who experiences it. Reports of phenomena associated with death such as out-of-the-body (OBE) and near death experiences (NDE) can only be studied post-hoc, since it is impossible to design a scientific study where an experimental group experiences death (and returns) and a control group does not. Yet NDEs seem to have a profound influence on the subsequent lives of people and are therefore worthy of study. Terror Management Theory, which argues that death anxiety contributes to in-group solidarity and hostility to out-groups, relies on studies that manipulate opinions and cannot be based on experiential evidence. Here we introduce a potential methodology that uses immersive virtual reality (VR) for the study of mortality and NDEs. Participants are embodied in alternate bodies in a beautiful island along with two companions. They explore the island and carry out tasks together. The mechanism of embodiment produces strong illusions of ownership over their life-sized virtual bodies. Over time each participant witnesses the death of the two companions and then her own death-which includes the reported features of an NDE (OBE, life review, the tunnel leading to white light) followed by a period of observation of the continuing activities in the virtual world on an external screen. Fifteen female participants experienced 6 sessions in the island, each starting as a child and gradually maturing, and eventually ageing and dying. Sixteen control subjects formed a waiting group. We introduce this as a methodology for the study of these issues, and present promising results, suggesting that those who experienced the island report life attitude changes, becoming more concerned with others and more interested in global rather than material issues compared to the control group. The results are based on a small sample size, and should be considered as indicative of the possibilities of this new methodology as a way forward for future studies in this field.
死亡率是人类状况中一个明显的、令人不快的部分,但对于经历过它的人来说,研究其影响是不可能的。与死亡相关的现象(如出体体验和濒死体验)的报告只能在事后进行研究,因为不可能设计一个科学研究,让实验组经历死亡(并返回),而对照组不经历。然而,濒死体验似乎对人们的后续生活产生了深远的影响,因此值得研究。死亡焦虑导致内群体团结和对外群体的敌意的“恐怖管理理论”依赖于操纵观点的研究,而不能基于经验证据。在这里,我们介绍了一种潜在的方法,即使用沉浸式虚拟现实(VR)来研究死亡率和濒死体验。参与者在一个美丽的岛屿上与两个同伴一起以另一个身体的形态出现。他们探索岛屿并一起完成任务。身体化的机制产生了对他们全尺寸虚拟身体的强烈所有权幻觉。随着时间的推移,每个参与者都会目睹两个同伴的死亡,然后是自己的死亡,这包括濒死体验的特征(出体体验、生命回顾、通向白光的隧道),然后是一段在外部屏幕上观察虚拟世界中持续活动的时期。15 名女性参与者经历了 6 次岛屿体验,每次都从一个孩子开始,逐渐成熟,最终衰老和死亡。16 名对照组受试者组成一个等待组。我们将其介绍为研究这些问题的一种方法,并呈现了有希望的结果,表明与对照组相比,那些经历过岛屿的人报告说生活态度发生了变化,对他人更加关注,对全球问题而不是物质问题更感兴趣。这些结果基于一个小样本量,应被视为这种新方法的可能性的指示,作为该领域未来研究的一种方法。