Modern industrial society is characterized by the growing threat of accidents and catastrophes caused by the human factor.
This is a very broad concept. It includes many aspects of human interaction with the technogenic environment, including the probability of operator errors caused by the instability of his psychophysiological state, which is incompatible with the strict technological regulations. At the shift work, this instability is often caused by disturbances in the physiological rhythm of sleep — wakefulness followed by a biological conflict between the forced activity and certain phases of the natural circadian rhythm in the cognitive structures of the brain. This situation known for thy night shift modes can also occur in the evening shift modes. However, the influence of the «day — evening» mode on the psychophysiological state of the shift workers is studied to a lesser extent.
The objective of this study was to identify the dynamics of the psychophysiological state of the employees of a certain «model» collective of the paint and varnish shop of the automobile plant, working in the shift mode «5 days — 2 days off — 5 evenings».
Test persons were tested immediately after the 1st, 3rd and 5th shifts using a questionnaire describing their self-assessment ranked in points according to four categories (scales).
Mathematical analysis of the results revealed a weak trend towards a decrease in the psychological indicators during the daytime work week, but a strong and statistically significant decrease in the evening shifts in relation to the daytime. Thus, the investigated rotational mode of work causes an increasing deterioration in the employee state in the evening shifts, which creates a risk of the impact of the psychogenic human factor on the occupational safety.
2. Optimal modes of the shift work at continuous production: shift cycle, shift duration, inter-shift, and weekly breaks in work: methodological recommendations. Мoscow: Federalnyy tsentr gigieny i epidemiologii Rospotrebnadzora, 2017. 57 p. (In Russ.).
3. Reppert S.M., Weaver D.R. Coordination of circadian timing in mammals. Nature. 2002. Vol. 418. pp. 935–941. DOI: 10.1038/nature00965
4. Hughes S., Jagannath A., Hankins M.W., Foster R.G., Peirson S.N. Photic regulation of clock systems. Methods Enzymology. 2015. Vol. 552. pp. 125–143. DOI: 10.1016/bs.mie.2014.10.018
5. Tsfasman A.Z., Gorokhov V.D., Alpaev D.V. Circadian Rhythms of Melatonin Secretion During Nocturnal Sleep Deprivation. Problemy endokrinologii = Problems of endocrinology. 2013. Vol. 59. № 2. pp. 40–44. (In Russ.).
6. Carrier J., Monk T.H. Circadian rhythms of performance: new trends. Chronobiology International. 2000. Vol. 17. Iss. 6. P. 719–732. DOI: 10.1081/cbi-100102108
7. Geiger-Brown J.M., Rogers V.E., Liu W., Ludeman E., Downton K., Diaz-Abad M. Cognitive behavioral therapy in persons with comorbid insomnia: a meta-analysis. Sleep Medical Review. 2015. Vol. 23. pp. 54–67. DOI: 10.1016/j.smrv.2014.11.007
8. Sorokin G.A., Frolova N.M., Grebenkov S.V. Prediction of health risks in case of disturbances in the daily rhythm of sleep and wakefulness of the employees: information and analytical review. Saint Petersburg, 2017. 42 p. (In Russ.).
9. Gohar A., Adams A., Gertner E., Sackett-Lundeen L., Heitz R., Engle R., Haus E., Bijwadia J. Working memory capacity is decreased in sleep-deprived internal medicine residents. Journal of Clinical Sleep Medicine. 2009. Vol. 5. Iss. 3. pp. 191–197.
10. Haidarimoghadam R., Kazemi R., Motamedzadeh M., Golmohamadi R., Soltanian A., Zoghipaydar M.R. The Effects of Consecutive Night Shifts and Shift Length on Cognitive Performance and Sleepiness: A Field Study. International Journal of Occupational Safety and Ergonomics. 2017. Vol. 23. Iss. 2. pp. 251–258. DOI: 10.1080/10803548.2016.1244422
11. Grundy A., Sanchez M., Richardson H., Tranmer J., Borugian M., Graham C.H., Aronson K.J. Light intensity exposure, sleep duration, physical activity, and biomarkers of melatonin among rotating shift nurses. Chronobiology International. 2009. Vol. 26. Iss. 7. pp. 1443–1461. DOI: 10.3109/07420520903399987
12. Karelin A. Great encyclopedia of the psychological tests. Мoscow: Eksmo, 2007. 416 p. (In Russ.).