Institute of Industrial Engineering and Ergonomics (IAW), RWTH Aachen University, Eilfschornsteinstraße 18, 52062 Aachen, Germany.
Institute of Highway Engineering (ISAC), RWTH Aachen University, Mies-van-der-Rohe-Straße 1, 52074 Aachen, Germany.
Acta Psychol (Amst). 2021 Oct;220:103402. doi: 10.1016/j.actpsy.2021.103402. Epub 2021 Sep 8.
The Index of Cognitive Activity (ICA) was introduced as a promising pupillary workload measure for field investigations since, unlike pupil dilation, it is not affected by illumination. Recent studies have investigated the ICA for task-evoked cognitive workload with contradictory findings. However, few studies investigated the influence of illumination on the ICA. Therefore, to examine inconsistencies regarding the reliability for workload measurement and the effects of light, a meta-analysis was conducted based on a structured literature review. The meta-analysis considered k = 14 studies with a total sample size of N = 751 participants. Results showed significant effects for workload (r = 0.61) and light (r = 0.45) on the ICA. Since moderating effects were found for several between-study differences, it seems likely that different cognitive processes and settings affect the indicator and should be considered in empirical investigations. According to the findings, the ICA is a reliable indicator for task-evoked workload. However, light influences were found which indicates that evidence-based conclusions regarding the ICA's practical applicability require further research.
认知活动指数 (ICA) 作为一种有前途的瞳孔工作量测量方法被引入到野外调查中，因为与瞳孔扩张不同，它不受光照的影响。最近的研究已经调查了 ICA 在任务诱发认知工作负荷方面的应用，但结果存在矛盾。然而，很少有研究调查光照对 ICA 的影响。因此，为了检查关于工作量测量的可靠性和光照影响的不一致性，我们进行了一项基于系统文献综述的荟萃分析。该荟萃分析考虑了 k=14 项研究，总样本量为 N=751 名参与者。结果表明，ICA 上的工作量 (r=0.61) 和光照 (r=0.45) 有显著影响。由于在几个研究之间的差异上发现了调节效应，因此不同的认知过程和环境可能会影响该指标，在实证研究中应加以考虑。根据研究结果，ICA 是任务诱发工作量的可靠指标。然而，也发现了光照的影响，这表明关于 ICA 实际适用性的循证结论需要进一步研究。
