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Showing 2 results for Environmental Ergonomics
An Investigation of Sick Building Syndrome (SBS) in Workplaces, (Case Study: Engineering Organization Building of Urmia)
Solmaz Tabe Afshar, Sahar Toofan, Arash Saghafi Asl,
Volume 10, Issue 2 (9-2022)
Abstract
Objectives: Undoubtfuly, people spend a significant portion of their time in workplaces. Many factors affect the health and well-being of employees. The present study aimed to identify the architectural problems of the environment by examining the symptoms of Sick Building Syndrome and ranking the parameters influenced by five physical factors (thermal comfort, noise, lighting, layout-ergonomics and decoration).
Methods: The present descriptive-analytical research was carried out in the summer of 2021. The statistical population included 52 employees of Urmia Engineering Organization Building which is based on Morgan's table and a sample size consisting 46 people was randomly selected. The required data were collected through a questionnaire and analyzed using descriptive statistics (frequency, percentage, mean and standard deviation) and Friedman test.
Results: Considering the average ranks, symptoms of fatigue (4.47), muscle pain (5.47), headache (5.87), high stress (6.14) and poor concentration (7.45), along with some defined parameters for each of the factors, including overcrowding and lack of speech privacy (78.12%), the noise of people's conversation (62.93%), improper workplace temperature in winter (58.59%) and summer (49.91%), inappropriate placement of uses and allocation of inadequate space for people and equipment (49.91%) played the most significant role.
Conclusion: The results indicated that the inefficient design of the environment and non-observance of ergonomic principles as a result of unprincipled renovations regardless of the nature of the work and its requirements, inappropriate placement of uses, the non-standard distribution of employees in an inflexible environment, lack of speech privacy and crowding were identified as the most important causes of the symptoms.

Investigation of the relationship between indoor illumination and luminance with sustained attention among administrative staff in selected healthcare centers of Ardabil Ardabil city in 2025
Rasoul Hemmatjo, Hajar Ebadi Garjan,
Volume 14, Issue 3 (10-2026)
Abstract
Background and Objectives: Advances in technology have led to widespread use of visual display terminals across occupations, resulting in prolonged exposure. Scientific studies show lighting significantly influences human attention by affecting consciousness levels. This study aimed to investigate the relationship between indoor illuminance, luminance and sustained attention among administrative staff in healthcare centers in Ardabil.
Methods: This descriptive study was conducted among 98 administrative staff in healthcare centers. Illuminance levels (at the work surface and user’s eye level) and luminance (at the user’s eye level from the screen and light source) were measured at workstations using a Hagner Universal photometer model S4. Sustained attention was assessed using the Continuous Performance Test (CPT) under workplace lighting conditions. Data were analyzed with SPSS version 27 using non-parametric statistical tests and Dunn’s post-hoc test.
Results: Results revealed a positive but non-significant correlation between sustained attention and work surface illuminance (p=0.123), luminance at the user's eye level from lighting sources (p=0.335) and from the screen (p=0.7). A positive and statistically significant relationship was observed between illuminance at the user's eye level and sustained attention (p=0.029). Dunn’s post-hoc test indicated this relationship was significant between lighting levels below 100 lx and 300 to 500 lx (p<0.05). Higher levels of lighting parameters were associated with shorter reaction times in the sustained attention test, although these associations did not reach statistical significance (p>0.05).
Conclusion: According to the results, illuminance at the user's eye level has a positive and statistically significant relationship with sustained attention among administrative staff. Therefore, implementing lighting interventions in the design and arrangement of lighting sources, along with use of visual display terminals with appropriate luminance, can be considered an effective strategy to enhance sustained attention in administrative personnel.

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