In: Reinberg A, Vieux N, Andlauer P (eds) Night and shift work: biological and social aspects. Accid Anal Prev 29:417–430įolkard S, Monk TH (1981) Individual differences in the circadian response to a weekly rotating shift system. Chronobiol Int 14:89–98įolkard S (1997) Black times: temporal determinants of transport safety. Occup Med 5:315–322Ĭosta G (1997) The problem: shiftwork. Literas Universitätsverlag, WienĬolligan MJ, Rosa RR (1990) Shiftwork effects on social and family life. (Validation of traffic psychology testing methods). J Manag Med 11):58–70īukasa B, Wenninger U, Brandstätter C (1990) Validierung Verkehrspsychologischer Testverfahren. Hogrefe, Gottingenīrooks I (1997) The lights are bright? Debating the future of the permanent night shift. 9., überarbeitete und neu normierte Auflage ed. The unequal distribution of the circadian types in the shift groups may indicate selection.īarton J (1994) Choosing to work at night: a moderating influence on individual tolerance to shift work. There was no indication of an increased risk of accidents after working NSs. Conclusions: The results of this study indicate that-if chosen voluntarily-working NSs has no immediate negative effects on cognitive and psychomotor performance when compared with working TSs. Chronobiological type alone or in combination with shift type had no effect on performance. Over the course of the shift, concentration and accuracy improved in both groups, as did reaction to stress. In the performance tests, the TS and NS workers did not differ at shift start or shift end. Results: TS workers were more frequently morning types whereas the NS workers were more frequently evening types. Each subject was tested at the beginning and end of the shift for alertness feeling of well-being (Basler) concentration and accuracy (d2) reaction speed, orientation and reaction to stress (Vienna System). Chronobiological type was determined by questionnaire (D-MEQ). Methods: The study included 44 male automobile workers, 20 working TSs and 24 working NSs. Objectives: The study aimed to clarify whether cognitive and psychomotor performance, which are important for occupational and traffic safety, are impaired by working permanent night shifts (NSs) compared with early–late two shifts (TSs) and whether age and chronobiological type influences the relationship between shift and performance.
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