Caola Barbara, Montalti Martina, Zanini Alessandro, Leadbetter Antony, Martini Matteo
School of Psychology, 117128 University of East London , London, UK.
Perception. 2018 Jan 1:301006618758211. doi: 10.1177/0301006618758211.
Classically, body ownership illusions are triggered by cross-modal synchronous stimulations, and hampered by multisensory inconsistencies. Nonetheless, the boundaries of such illusions have been proven to be highly plastic. In this immersive virtual reality study, we explored whether it is possible to induce a sense of body ownership over a virtual body part during visuomotor inconsistencies, with or without the aid of concomitant visuo-tactile stimulations. From a first-person perspective, participants watched a virtual tube moving or an avatar's arm moving, with or without concomitant synchronous visuo-tactile stimulations on their hand. Three different virtual arm/tube speeds were also investigated, while all participants kept their real arms still. The subjective reports show that synchronous visuo-tactile stimulations effectively counteract the effect of visuomotor inconsistencies, but at slow arm movements, a feeling of body ownership might be successfully induced even without concomitant multisensory correspondences. Possible therapeutical implications of these findings are discussed.
传统上,身体所有权错觉是由跨模态同步刺激引发的,并受到多感官不一致的阻碍。尽管如此,这种错觉的边界已被证明具有高度可塑性。在这项沉浸式虚拟现实研究中,我们探讨了在视觉运动不一致的情况下,无论有无伴随的视觉触觉刺激,是否有可能在虚拟身体部位上诱发身体所有权感。从第一人称视角来看,参与者观看虚拟管子移动或虚拟角色的手臂移动,同时他们的手部会有或没有伴随的同步视觉触觉刺激。还研究了三种不同的虚拟手臂/管子速度,而所有参与者都保持其真实手臂静止不动。主观报告表明,同步视觉触觉刺激有效地抵消了视觉运动不一致的影响,但在手臂缓慢移动时,即使没有伴随的多感官对应,身体所有权感也可能成功诱发。我们讨论了这些发现可能的治疗意义。