沉浸式学习环境下学习者认知负荷测量

Measurement of Learners'Cognitive Load in Immersive Learning Environment

沉浸式学习环境借助智慧课室、虚拟现实(VR)、5G技术,实现了为学习者提供跨越空间、时间的沉浸式体验,有利于学习者以自己为中心积极主动地参与到课堂内容的学习。然而沉浸式学习环境下又因其自身的环境虚拟性、操作复杂性、任务多样性等无形之中增加了学习者的认知负荷。文章通过对现有的沉浸学习情境中学习者的认知负荷的测试方法进行了分析,并对现有测试手段存在的缺陷进行了梳理,并提出了一种全面的沉浸学习环境中学习者的认知负荷测试方法。即“脑电捕获+主观评定”,首先通过计算“脑电捕获”相关数据来获取学习者认知负荷的瞬时大小,其次通过“主观评定”来验证测量结果的准确性,对测量结果进行验证,以增强本测量方法的可信度。

With the help of smart classroom,Virtual Reality(VR)and 5G technology,the immersive learning environment provides learners with immersive experience across space and time,which is conducive to learners'self-centered and active participation in the learning of classroom content.However,the immersive learning environment also increases the cognitive load of learners because of its own virtual environment,operational complexity,task diversity and other intangible factors.This paper analyzes the existing test methods of learners'cognitive load in the immersive learning environment,combs the defects of the existing test methods,and proposes a comprehensive test method of learners'cognitive load in the immersive learning environment.That is,“EEG capture+subjective assessment”.Firstly,the instantaneous size of learners'cognitive load is obtained by calculating the relevant data of“EEG capture”.Secondly,the accuracy of the measurement results is verified by“subjective assessment”,and the measurement results are verified to enhance the credibility of this measurement method.