CeREF, Mons, Belgium.
Centre National de Rééducation Fonctionnelle et de Réadaptation - Rehazenter, Laboratoire d'Analyse du Mouvement et de la Posture (LAMP), Luxembourg, Grand-Duché de Luxembourg.
PLoS One. 2020 May 19;15(5):e0232328. doi: 10.1371/journal.pone.0232328. eCollection 2020.
Digital natives developed in an electronic dual tasking world. This paper addresses two questions. Do digital natives respond differently under a cognitive load realized during a locomotor task in a dual-tasking paradigm and how does this address the concept of safety? We investigate the interplay between cognitive (talking and solving Raven's matrices) and locomotor (walking on a treadmill) tasks in a sample of 17 graduate level participants. The costs of dual-tasking on gait were assessed by studying changes in stride interval time and its variability at long-range. A safety index was designed and computed from total relative change between the variability indices in the single walking and dual-task conditions. As expected, results indicate high Raven's scores with gait changes found between the dual task conditions compared to the single walking task. Greater changes are observed in the talking condition compared to solving Raven's matrices, resulting in high safety index values observed in 5 participants. We conclude that, although digital natives are efficient in performing the dual tasks when they are not emotional-based, modification of gait are observable. Due to the variation within participants and the observation of high safety index values in several of them, individuals that responded poorly to low cognitive loads should be encouraged to not perform dual task when executing a primate task of safety to themselves or others.
数字原住民在电子双重任务的世界中成长。本文解决了两个问题。在双重任务范式中，认知负荷（在跑步机上行走时进行的认知任务）下，数字原住民的反应是否不同，以及这如何解决安全概念？我们在 17 名研究生参与者样本中研究了认知任务（交谈和解决 Raven 矩阵）和运动任务（在跑步机上行走）之间的相互作用。通过研究步长时间及其在长距离内的可变性变化，评估了步态双重任务的成本。设计并计算了安全指数，该指数来自于单步行和双重任务条件之间的可变性指数之间的总相对变化。结果表明，与单步行任务相比，在双重任务条件下，Raven 分数较高，并且发现了步态变化。与解决 Raven 矩阵相比，在交谈条件下观察到更大的变化，导致 5 名参与者中观察到较高的安全指数值。我们得出结论，尽管数字原住民在非情感基础上执行双重任务时效率很高，但可以观察到步态的改变。由于参与者之间存在差异，并且在其中几个人中观察到高安全指数值，因此应该鼓励那些对低认知负荷反应不佳的人在执行对自己或他人安全的灵长类任务时不要执行双重任务。
