Mohebian Zohreh, Farhang Dehghan Somayeh, Dehghan Habiballah
Department of Occupational Health Engineering, Iranshahr University of Medical Sciences, Iranshahr, Iran.
Department of Occupational Health, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
ScientificWorldJournal. 2018 May 9;2018:5171582. doi: 10.1155/2018/5171582. eCollection 2018.
Heat exposure and unsuitable lighting are two physical hazardous agents in many workplaces for which there are some evidences regarding their mental effects. The purpose of this study was to assess the combined effect of heat exposure and different lighting levels on the attention rate and reaction time in a climatic chamber. This study was conducted on 33 healthy students (17 M/16 F) with a mean (±SD) age of 22.1 ± 2.3 years. The attention and reaction time test were done by continuous performance test and the RT meter, respectively, in different exposure conditions including the dry temperatures (22°C and 37°C) and lighting levels (200, 500, and 1500 lux). Findings demonstrated that increase in heat and lighting level caused a decrease in average attention percentage and correct responses and increase in commission error, omission error, and response time ( < 0.05). The average of simple, diagnostic, two-color selective, and two-sound selective reaction times increased after combined exposure to heat and lighting ( < 0.05). The results of this study indicated that, in job task which requires using cognitive functions like attention, vigilance, concentration, cautiousness, and reaction time, the work environment must be optimized in terms of heat and lighting level.
在许多工作场所，热暴露和不合适的照明是两种物理危害因素，关于它们对心理的影响已有一些证据。本研究的目的是评估在气候舱中热暴露和不同光照水平对注意力和反应时间的综合影响。本研究对33名健康学生（17名男性/16名女性）进行，平均年龄（±标准差）为22.1±2.3岁。注意力和反应时间测试分别通过连续操作测试和反应时间测量仪在不同暴露条件下进行，包括干燥温度（22°C和37°C）和光照水平（200、500和1500勒克斯）。研究结果表明，热和光照水平的增加导致平均注意力百分比和正确反应减少，以及错误率、遗漏错误和反应时间增加（P<0.05）。热和光照联合暴露后，简单、诊断性、双色选择性和双声选择性反应时间的平均值增加（P<0.05）。本研究结果表明，在需要运用注意力、警觉性、专注力、谨慎性和反应时间等认知功能的工作任务中，必须在热和光照水平方面优化工作环境。
