Luczak Anna, Sobolewski Andrzej
Central Institute for Labour Protection-National Research Institute, Department of Ergonomics, 00-701 Warsaw, Czerniakowska, 16, Poland.
Ergonomics. 2005 Dec 15;48(15):1770-92. doi: 10.1080/00140130500241753.
The aim of the study was to verify a hypothesis that critical flicker fusion frequency (CFFF) is season-related because of changes in the intensity and duration of sunlight. CFFF has a wide application in different fields, generally as an indicator of human workload. Therefore, confirmation of previous observations that CFFF is subject to a seasonal rhythm could make theoretical as well as practical sense. The analysis was based on data obtained from 23 male participants, aged 28-60 years. The study lasted 12 months. CFFF was measured with the flicker test. The results of statistical analysis indicate that CFFF changes over time. There are two forms of those changes: a linear trend and oscillations around the trend. Moreover, individual differences in the longitudinal course of CFFF (in trends as well as in oscillations) are observed. The conclusion is that CFFF is subject to longitudinal changes, whose pattern depends on individual differences. Additionally, the individual character of the CFFF changes over time allow the assumption that sunlight is probably not as significant a factor as expected, one that can modify the hypothetical pattern of season-related CFFF fluctuation. The obtained results are important for the methodology of experiments with CFFF and for the interpretation of the results of the flicker test.
本研究的目的是验证一个假设，即由于阳光强度和持续时间的变化，临界闪烁融合频率（CFFF）与季节相关。CFFF在不同领域有广泛应用，通常作为人类工作量的一个指标。因此，证实先前关于CFFF受季节性节律影响的观察结果在理论和实践上都有意义。该分析基于从23名年龄在28至60岁之间的男性参与者获得的数据。研究持续了12个月。通过闪烁测试测量CFFF。统计分析结果表明CFFF随时间变化。这些变化有两种形式：线性趋势和围绕趋势的振荡。此外，观察到CFFF纵向过程中的个体差异（在趋势以及振荡方面）。结论是CFFF会发生纵向变化，其模式取决于个体差异。此外，CFFF随时间变化的个体特征使得人们可以假设阳光可能不像预期的那样是一个重要因素，即一个可以改变与季节相关的CFFF波动假设模式的因素。所获得的结果对于使用CFFF的实验方法以及闪烁测试结果的解释都很重要。
