MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK.
UK Centre for Tobacco and Alcohol Studies, School of Experimental Psychology, University of Bristol, Bristol, UK.
Psychol Res. 2021 Sep;85(6):2444-2452. doi: 10.1007/s00426-020-01393-2. Epub 2020 Jul 31.
We used the 7.5% carbon dioxide (CO) model of anxiety induction to investigate the effects of state anxiety on normal gait and gait when navigating an obstacle. Healthy volunteers (n = 22) completed a walking task during inhalations of 7.5% CO and medical air (placebo) in a within-subjects design. The order of inhalation was counterbalanced across participants and the gas was administered double-blind. Over a series of trials, participants walked the length of the laboratory, with each trial requiring participants to navigate through an aperture (width adjusted to participant size), with gait parameters measured via a motion capture system. The main findings were that walking speed was slower, but the adjustment in body orientation was greater, during 7.5% CO inhalation compared to air. These findings indicate changes in locomotor behaviour during heightened state anxiety that may reflect greater caution when moving in an agitated state. Advances in sensing technology offer the opportunity to monitor locomotor behaviour, and these findings suggest that in doing so, we may be able to infer emotional states from movement in naturalistic settings.
我们使用 7.5%二氧化碳（CO）焦虑诱发模型来研究状态焦虑对正常步态和穿越障碍物时步态的影响。健康志愿者（n=22）在一项内隐设计中完成了在吸入 7.5%CO 和医用空气（安慰剂）时的行走任务。吸入顺序在参与者之间平衡，并且气体是双盲给予的。在一系列试验中，参与者沿着实验室的长度行走，每次试验都要求参与者穿过一个孔径（宽度根据参与者的大小进行调整），通过运动捕捉系统测量步态参数。主要发现是，与空气相比，在吸入 7.5%CO 时，行走速度较慢，但身体方向的调整更大。这些发现表明，在高度焦虑状态下，运动行为发生了变化，这可能反映出在激动状态下移动时更加谨慎。传感技术的进步为监测运动行为提供了机会，这些发现表明，通过这样做，我们可能能够从自然环境中的运动推断出情绪状态。
