Assessment criteria for mental fatigue. A factor-analytic study of phase discrimination in mental fatigue.
Assessment criteria for mental fatigue. A factor-analytic study of phase discrimination in mental fatigue.
复制标题
精神疲劳的评估标准。
DOI：
10.1080/00140137108931230
复制
发表时间：
1971
期刊：
影响因子：
2.4
通讯作者：
Y. Saito
中科院分区：
文献类型：
--
作者：
K. Kogi;Y. Saito
Abstract In dealing with observed data of fatigue studies, it is essential to distinguish ‘ overfatigued ’ phases. To compare the data with the test results before work, for instance, is not always recommended, since the latter themselves represent merely a cross-section of the variation. Discrimination of phases in the course of diurnal variation of cortical functions was attempted for operators in the train control centre. Critical flicker fusion frequency was measured at different periods of a 24.hour shift. Correlation coefficients among periods w-ere computed and three underlying factors were extracted by factor analysis (principal component analysis and varimax rotation). In accordance with these three factors, the shift periods could be classified into (I) the morning-rise phase, (II) the intermediate phase, (III) night-and-early-morning phase, and (IV) after-overnight-vigil phase. Phase IV, although in the morning hours, did not show the features of phase I, but was characterized by markedly diffe...
