【摘要】 测量认知负荷需要解决三个关键问题:明确认知负荷这一构念的内涵;确定认知负荷的可观察的行为指标;根据观察指标对认知负荷状况作出可靠且有效的解释。目前,对认知负荷内涵的阐释已从单纯依赖工作记忆的有限加工容量转向综合考虑工作记忆的有限加工容量与加工时间。采用学习者在有关认知负荷的自陈问卷上的反应、在次级任务上的表现以及学习期间的神经生理反应作为认知负荷的行为指标已得到大多数研究者的认可。借助实验控制和因素分析的方法,这些行为指标与所测量的认知负荷及其类型之间已初步建立了可靠且有效的联系。未来认知负荷的测量可在明确相关认知负荷的定位、提高问卷法测量认知负荷类型的效度、运用神经生理反应动态地测量认知负荷、综合多种测量方法上有所发展。更多还原

【Abstract】 Measuring cognitive load requires solving three issues: defining the cognitive load, collecting the observable behavioral indicators of cognitive load, and making reliable and valid interpretations of cognitive load based on observed indicators. At present, the interpretation of the cognitive load has shifted from the limited processing capacity of working memory to the limited processing capacity and processing time of working memory. The use of learners’ self-reported cognitive load ratings, performance on secondary tasks, and neurophysiologic indices during learning as behavioral indicators of cognitive load have been recognized by most researchers. By means of experimental control and factor analysis, a reliable and valid link between these behavioral indicators and the measured cognitive load and its types is under construction. The measurement of cognitive load can be promoted by defining the germane cognitive load, improving the validity of the cognitive load subjective rating scale, measuring cognitive load dynamically via neurophysiologic parameters, and integrating multiple measurement methods.更多还原