احسان الله حبیبی - Department of Occupational Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
حبیب الله دهقان - Department of Occupational Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
سیدمهدی موسوی - Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
پرنیان ایل بگ - Department of Occupational Health Engineering, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran.
مهسا جهادی نائینی - Student Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran

Background & Aims of the Study: Cognitive functions, such as precision and speed, significantly affect human errors and incidents. The temperature of light color and heat can impact cognitive functions. Therefore, the present study examined the effect of heat and color temperature on the speed and precision of work in the laboratory. Materials and Methods: This study was conducted on ۱۰ female students in the Laboratory of Atmospheric Medical School of Isfahan University of Medical Sciences in Isfahan City, Iran. Piron v-vibrometer and precision and target vibrometer devices were used to measure accuracy and speed. The test was held in ۴ turns, each time for ۱ hour. The first turn, ۲۲°C, and color temperature ۳۰۰۰°K, the second turn ۲۲°C and color temperature ۶۰۰۰°K, the third turn ۳۶°C and color temperature ۳۰۰۰°K and the fourth turn ۳۶°C and color temperature ۶۰۰۰°K, adjusted. Results: Based on the obtained results, precision measurement with precision and target vibrometer was significant in two cases with a color temperature of ۳۰۰۰ and temperatures of ۲۲°C and ۳۶°C (P<۰.۰۵); thus, with increasing temperature, the frequency of errors enhanced, and consequently the precision decreased. Furthermore, the speed measurement with the precision and target and Piron v-vibrometer in color temperature state ۶۰۰۰ and temperatures of ۲۲°C and ۳۶°C and the color temperature of ۳۰۰۰ and temperatures ۲۲°C and ۳۶°C were significant (P<۰.۰۵). In other words, with increasing temperature, the time of work decreased, and as a result, the speed of work increased, and in other cases, no significant relationship was observed (P>۰.۰۵). Conclusion: In general, the present study results indicated that the precision of work at ۳۶°C is less than exposure to ۲۲°C; the speed of work is higher, and changing the color temperature of light has no significant effect on increasing the precision of work. Therefore, it is suggested to use control strategies to reduce the temperature in environments with temperatures higher than comfort

Heat stress, Light color temperature, Cognitive function