Abstract
Despite the physiological response of the body to heat has been modeled and described well, the effects of heat stress on cognitive ability are still not well understood. This study aims at measuring mental work load and specifically the effects of hot and humid weather on the level of mental work load among managers and supervisors working on a project of South Pars phases in Bushier (one of the province in south of Iran) . This study is descriptive–analytic and was carried out in two phases: the first phase in winter (February and March 2012) and the second one in summer (July and August 2013). A total of 98 managers and supervisors completed the questionnaires. Method of implementing was the same in both phases, and the same sample took part in both phases. The temperature and humidity information were obtained from synoptic stations. Results of this study showed that there is a direct relationship between the prevailing weather conditions in summer and mental work load. With increasing temperature and relative humidity and in sultry conditions, mental work load of managers and supervisors increased. Based on the results obtained, mental work load of managers and supervisors in South Pars phase projects is high. Nowadays, along with new jobs, work environments are getting more complex and require higher mental activities. Therefore, in addition to assessing physical work load, evaluating mental work load is very important. Also, to reduce mental work load, identifying its causes and factors affecting it is essential. Climate is a potential factor influencing mental work load.



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American Meteorological Society (2005) http://www.ametsoc.org/pubs/cr_2005.html
American Petroleum Institute (2010) Putting Earnings into Perspective. API Commun 2010:109
Azer NZ, Mcnall PE, Leung HC (1972) Effects of heat stress on performance. Ergonomics 15:681–691
Bell PA (1981) Physiological, comfort, performance, and social effects of heat stress. J Soc Issues 37:71–94
Bell CR, Provins KA (1962) Effects of high temperature environmental conditions on human performance. Occup Med 4:202–211
Bell CR, Provins KA, Hiorns RW (1964) Visual and auditory vigilance during exposure to hot and humid conditions. Ergonomics 7:279–288
Chiles WD (1958) Effects of elevated temperatures on performance of a complex mental task. Ergonomics 2:89–96
Colquhoun WP (1969) Effects of raised ambient temperature and event rate on vigilance performance. Aerosp Med 40:413–417
Didomenico A, Nussbaum MA (2011) Effect of different physical work load parameters on mental work load and performance. Int J Ind Ergon 41:255–260
Fine BJ, Kobrick JL (1978) Effects of altitude and heat on complex cognitive tasks. Hum Factors 20:115–122
Fraser DC (1957) Environmental stress and its effects on performance. Occup Psychol 21:248–255
Grether WF (1973) Human performance at elevated environmental temperatures. Aerosp Med 44:747–755
Grether WF, Harris CS, Mohr G, Nixon CW, Ohlbaum M, Sommer HC, Thaler VH, Veghte JH (1971) Effects of combined heat, noise and vibration stress on human performance and physiological functions. Aerosp Med 42:1092–1097
Hancock PA (1984) Environmental stressors. In: Warm JS (ed) Sustained attention n human performance. Wiley, Chichester, pp 103–142
Hancook PA, Vasmatzidis I (2013) Effects of heat stress on cognitive performance: the current state of knowledge. Int J Hyperth 19:355–372
Hart SG, Staveland LE (1988) Development of NASA-TLX (task load index): results of empirical and theoretical research. In: Hancock PA, Meshkati N (eds) Human mental work load. Elsevier Science Publishers, North-Holland
Karwowski W (2001) international encyclopedia of ergonomics and human factors, vol 3. Taylor & Francis, London
Kavousi A, Meshkani MR (2009) Spatial analysis of humidity and temperature of Iran. Lect Notes Comput Sci 5592:94–106
Khoynezhad GR, Rajaei AR, Shakib AH, Rahimi F (2008) Comparison of occupational stress among school administrators with an external-internal locus of control. J Edu Res 4:1–17
Kobrick JL, Fine BJ (1983) Climate and human performance. In: Oborne DJ, Gruneberg M (eds) The physical environment at work. Wiley, Chichester, pp 69–107
Kobrick JL, Johnson RF (1991) EFFects of hot and cold environments on military performance. In: Gal R, MangelsdorV AD (eds) Handbook of military psychology. Wiley, Chichester, pp 215–232
Lan L, Lian Z et al (2010) The effects of air temperature on office workers’ well-being, work load and productivity-evaluated with subjective ratings. Appl Ergon 42:29–36
Lewis MI, Meese GB, Kok R (1983) The effects of moderate cold and heat stress on the potential work performance of industrial workers (Pretoria: National Building Research, Institute Council for Scientific and Industrial Research), CSIR Rep. No. 589
Mackworth NH (1947) The breakdown of vigilance during prolonged visual search. Q J Exp Psychol 6:21
Moazen Jamshidi MHM, Rasli A, Yusof R (2012) Essential competencies for the supervisors of oil and gas industrial companies. Proc Soc Behav Sci 40:368–374
Mobarak HE, Varshosaz K (2011) THI index in Khuzestan province of Iran in july 1990-2005. In: National conference on climate change and its impact on agriculture and the environment, Urmia, Iran [Persian]. http://www.civilica.com/Paper-NCCCIAE01-NCCCIAE01_125.html
Mohamadi M, Nasl seraji J et al (2011) Evaluation of mental work load from the producing aspects in one of the Tehran medical university hospitals. Dissertation, Tehran medical university Hygiene department. Institute of Hygiene Research. [Persian]
Pepler RD (1959) Warmth and lack of sleep: accuracy or activity reduced? J Comp Physiol Psychol 52:446–475
Pepler RD (1960) Warmth, glare and a background of quiet speech: a comparison of their effects on performance. Ergonomics 3:68–73
Pheng Low S, Tai Chuan Q (2006) Environmental factors and work performance of project managers in the construction industry. Int J Project Manage 24:24–37
Pilcher JJ, Nadler E, Busch C (2002) Effects of hot and cold temperature exposure on performance: a meta-analytic review. Ergonomics 45(10):682–698
Ramsey JD (1983) Heat and cold. In: Hockey GRJ (ed) Stress and fatigue in human performance. Wiley, Chichester, pp 33–60
Ramsey JD, Kwon YG (1992) Recommended alert limits for perceptual motor loss in hot environments. Int J Ind Ergon 9:245–257
Ramsey JD, Morrissey SJ (1978) Isodecrement curves for task performance in hot environments. Appl Ergon 9:66–72
Ramsey JD, Pai SB (1975) Sedentary work by females in hot environments. In: Proceedings of the human factors society 19th annual meeting. Human Factors Society, Santa Monica, pp 498–500
Ramsey JD, Dayal D, Ghahramani B (1975) Heat stress limits for sedentary workers. Am Ind Hyg Assoc J 36:259–265
Razmjou S (1996) Mental workload in heat: toward a framework for analyses of stress state. Aviat Space Environ Med 67:530–538
Saberi HR, Moravveji AR, Naseh J (2011) Occupational burnout among school teachers and some related factors in kashan 2007. Iran South Med J 14(1):41–50 [Persian]
Saxton J (2006) Iran’s oil and gas wealth, joint economic committee. Res Rep 2006 109(31)
Shikdar AA, Sawaqed MN (2004) Ergonomics, and occupational health and safety in the oil industry: a managers’ response. Comput Ind Eng 47:223–232
Tumpkins B (2010) Speed manufacturing’s new competitive challenge. Tompkin Associates, Tompkin
Wilkinson R (1969) Some factors influencing the effect of environmental stressors upon performance. Psychol Bull 72:260–272
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Jazani, R.K., Miandashti, R., Kavousi, A. et al. The effect of hot and humid weather on the level of mental workload among managers and supervisors on a project of South Pars phases, Iran. Cogn Tech Work 18, 11–17 (2016). https://doi.org/10.1007/s10111-015-0342-2
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DOI: https://doi.org/10.1007/s10111-015-0342-2