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The effect of office noise on performance has lately become the topic of much debate. Several studies have tried to objectively measure the results of noise on office operation, but no consensus was reached. Studies have attempted to check the impact of ambient noise on degrees of alertness and fatigue, however, the results are combined. A number of researchers report that the results are consistent across a large number of categories, but decisions are frequently controversial. A unique laboratory evaluation (EQ-i) was developed for the experimental assessment of office noise. The test has been demonstrated to be a reliable instrument for measuring the effect of sound on office productivity.

The EQ-i relies on two components. 1 component measures the cognitive processing of workplace workers, while another element measures the subjective response of office workers to different visual stimuli. The testing procedure is performed in a quiet area with the noise of a computer turned off. A battery of tests is performed on a particular group of office personnel. A subjective questionnaire can be carried out on every individual to receive information in their working habits and feelings concerning the workplace atmosphere. After a series of evaluations are conducted on a random sample of workplace personnel, an average total score is calculated for each person.

Several alternative explanations have been advanced to account for the results of the EQ-i outcomes. Possible explanations are that office workers were not subjected to sufficient high intensity or low intensity sound throughout the testing interval, office equipment was malfunctioning or inaccurate, or the results were skewed due to several confounding factors. No alternate explanation has not yet been offered that can clarify the results obtained from this test.

An evaluation research was conducted to determine the relationship between ambient temperatures and indoor lighting in a medical setting. Researchers measured indoor lighting at four distinct points in the office space and found a strong and significant relationship between both. The investigators attributed this connection to the effect of light on worker's moods. Indoor temperature was shown to be negatively associated with the disposition of office employees as evidenced by a statistically significant increase in stress levels. The authors concluded that"the present review... suggests that there is a negative relationship between ambient temperature and mood among office workers."

In another study, researchers tested the impact of reddish blue light on neurobehavioral testing. They quantified neurobehavioral testing in a dimly-lit area and found no real difference in performance between states. However, the researchers emphasized the importance of using an appropriate neurobehavioral testing protocol and performing standardized psychological tests in clinical settings. They also highlighted that more studies must be done in order to analyze the impact of reduced illumination on neurobehavioral testing.

A third research project tried to measure the impact of temperature on reaction time in a lab setting. Researchers measured reaction time at a dimly-lit room and discovered that the reaction time increased if there was an increase in room temperature. However, they stressed that this was not a significant impact and was influenced by the existence of different factors. For instance, a slight increase in temperature decreased the quantity of beta activity. Furthermore, the researchers emphasized that the effect of temperature on the response time could have significant implications for executive function evaluation.

The fourth study project analyzed the effect of temperature on executive function in an environment with two different light-sensitivity levels (daylight or dark). Two office workers, one with a day/night preference and the other with a no-light preference, participated in a job where their performance was analyzed with a reaction time paradigm. After completing the task, the performance of the two office workers was compared. The results demonstrated a significant principal effect of temperature on the reaction time (p = 0.049). The authors concluded,"A distinct window of temperature advantage may donate to executive processing speed." This study demonstrated that fever did indeed have a favorable impact on reaction time as it had been controlled for ambient lightness or darkness.

In general, these studies confirm the significance of temperature for function performance. Specifically, they show that temperature can modulate multiple areas of performance like attention, mood, alertness, and psychological performance. Office workers are particularly susceptible to temperature changes, which is probably because of the inherently challenging nature of the work that involves sitting before a computer screen or working with extreme lighting conditions.

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