ERGO-PSYCHOPHYSIOLOGY DECREASING PHYSIOLOGICAL RESPONSES, INCREASING ALERTNESS, WORK ABILITY AND WORK ENGAGEMENT AT THE ACCOUNTING DEPARTMENT OF BALI HYATT HOTEL, DENPASAR

Employee's performance can be determined from physiological responses, alertness, work ability and work engagement. The performance can be achieved when employees are able to adjust the capacity to the existing task demands, once is in accounting department. This department requires the ability to adjust the capacity of employees physiologically and psychologically with the tasks demands, one of the tasks was maintaining financial balance by using a computer. Employees work comfortably, safely, healthy thus increasing productivity. The working conditions need to be improved to prevent fatigue, complaints, discomfort, injury, stress, until disorder/disease that affects the company performance. It is to apply ergonomics interventions with emphasis on the psychological approach or Ergo-Psychophysiology. Experimental studies have been carried out with treatment by subject design to the 17 employees at accounting department of Bali Hyatt Hotel, Denpasar. Sample performance observed when working in conventional condition (first period) and when working with treated Ergo-Psychophysiology (second period). Employee performance data between the two periods compared and analyzed by t-paired test at the significance level of 0.05. The data results showed that a decreased in the physiological response based on the decrease of fatigue was 22.18 % and musculoskeletal complaints was 9.08 %. The alertness of employee increased based on increase of pace of work was 12.73 %, an increase of accuracy was 9.52 % and increased of constancy was 21.62 %. An increased of work ability was 7.57% and an increased of work engagement was 16.73 % (p<0.05). There was no significance result for workload based on the working pulse (p>0.05). The results showed that the ErgoPsychophysiological influenced employee performance based on physiological responses, alertness, work ability and work engagement, although the workload is not affected. This suggests that task demand of employment in the accounting department is more mental abilities than physical activity. It was concluded that the Ergo-Psychophysiology decrease the physiological response based on the decrease in fatigue and musculoskeletal complaints. Ergo-Psychophysiology also increases alertness, work ability and work engagement. It is suggested to support on mental working condition in the accounting department.


INTRODUCTION
Work is performed by most of people because it is an obligation and also to live. By working person will get a reward or income in order to earn a living and meet their needs. For some people work is selfactualization. It means self potential can be realized and possessed higher expressed through working after other need such as physiological needs, safety, sense of belonging, and the other have been met.
Balinese working population according to data from Statistics of Bali Province is 2,177,358 people from a population of 3,521,477 people, or by 61.83% (BPS Prov. Bali, 2011a;BPS Prov. Bali, 2011b). A job in the tourism sector remains a favorite one. It can be seen from the BPS data in 2010 that showed that people who work in the trade, hotels and restaurants totaled 571,274 people.
Related to the work then there are factors that affect people can work optimally. These factors are work ability and work engagement. Work ability is the ability of a person to do the job, can be measured by the Work Ability Index (WAI) (Ilmarinen, 2007). Purnawati (2011) found that 12 bank employees had a mean work ability index 2.69 + 42.54 and are in the medium category. This indicates that the ability of employees still can be improved.
Work engagement is a positive mental state, fulfilling and related with work, can be measured by the Utrecht Work Engagement Scale (UWES) (Schaufeli and Bakker, 2003). From the preliminary study of seven employees at the financial administration in Bali College obtained the mean of work engagement was 3.387 + 0.543 and classified in the category average. This showed that work engagement still be able to be improved.
Ergo-Psychophysiology selected to decrease workload, musculoskeletal complaints, fatigue, and increase alertness, work ability and work engagement at the accounting department of Bali Hyatt Hotel. These interventions also expected to improve employee performance and give beneficial for the hotel.

METHODS
This study was an experimental research with the treatment by subject design. The number of sample was 17 people. The comparability test using t-paired test with a significance level of α = 0.05.  Table 4 showed that the mean of working pulse first period was 69.18  6.83 bpm and in second period was 69.00  7.54 bpm. Analysis of significance with t-paired test showed that the value of t = 0.392 and p = 0.703. This means that the the mean of working pulse in both periods did not differ (p > 0.05). A job in the accounting department can be categorized as a job with a very light workload. In doing their job, the employee do not need a lot of physical activity, but rather to work with the demands of mental activity. Table 5 showed that the mean score of fatigue in the first period was 41.65  5.29 and second period was 32.41  2.18. Analysis of significance with t-paired test showed that the value of t = 9.02 and p = 0.001. This means that in the two groups in both periods, the mean fatigue significantly different (p < 0.05). An increase of fatigue in the first period because of several factors, such as job demands/workload and energy expenditure. Someone needs energy to maintain body functions, and when the physical work increased energy needs. Reduction in fatigue was 22.19 %. Adiatmika (2007) found that improvements in working conditions with total ergonomics approach can significantly reduce fatigue from a score of 37.77 to 35.37 or 6.79% at painting metal crafters in Kediri Tabanan.  Table 6 showed that the mean score of musculoskeletal complaints in the first period was 35.00  4.21 and in second period was 31.82  2.72. Analysis of significance with t-paired test showed that the value of t = 4.70 and p = 0.001. This means that the mean musculoskeletal complaints in both periods were significantly different (p<0.05). Musculoskeletal complaints arising in the first period due to the load on the muscles, especially in the area of the back, hips, shoulders, and neck because employees work sitting in a chair, using a computer with the static position for long time.

Subject Characteristics
According Manuaba (1998), the force posture at work and last long cause the load on the musculoskeletal system and the negative effects on health. Purnawati (2012) reported that there was a decrease of 10.5 % musculoskeletal complaints after being given Ergo-JSI on national private bank employee in Denpasar Bali. In the application of Ergo-JSI, employees working posture ergonomically improved such as the eye height is to adjust the height of the computer monitor, runway utilization leg and foot space, and the use of the backrest.
Meanwhile, Indrawati (2013) reported that there is a decrease of 71.99 % musculoskeletal complaints after stretching training and active rest on employees BRM in Sanglah Hospital. The mean of musculoskeletal complaints after working on the PI was 16.89 and 77.36 + 45.56 + 11.92 on PII. There has been a significant decline. Table 7 showed that the alertness between first period to second period significantly different (p < 0.05). Indrawati (2013) found that an increase in pace of work by 80.06 %, 61.89 % increase in accuracy and constancy 40.08 % on employee medical records Sanglah Hospital after being given training stretching and active rest. Increase in the mean of pace of work on PI was 26.03 to 15.00 on PII. The mean accuracy on PI was 18.01 to 13.5 on PII. The mean constancy on PI was 7.22 to 6.23 on PII. Darmadi (2009) found that the pace of work in the control group and the intervention group showed a mean difference in the rate of 0.83 or 10.75 %. The level of accuracy increased 2.89 or 35.94 %. Constancy rate increased 0.80 or 20.78 %. Wijayanti (2009) reported that there is a significant decrease in pace of work, accuracy and constancy after improve work posture by using tables and chairs when working practices on Carving junior high school students. Decrease in pace of work can be seen from the decrease in the mean was 10.11 + 0.42 on P0 to 7.30 + 0.29 on P1. The mean decrease in accuracy was 12.81 + 1.36 on P0 to 3.6 + 0.71 on P1. The mean decrease of constancy was 7.74 + 2.42 on P0 to 3.63 + 0.46 on P1. Table 8 showed that the mean score on the work ability of the first period was 40.41  2.96 and 43.47  3.37 on second period. Analysis of significance with t-paired test showed that the value of t = 8.36 and p = 0.001. This means that the mean of work ability in both periods were significantly different (p < 0.05). Important factors that can reduce working capacity is the lack of vigorous leisure -time physical activity, poor musculoskeletal capacity, older age, obesity, and high physical and psychosocial work demands (Van de Berg et al., 2009). Vedovato et al. (2009) reported that the decrease in WAI related with psychosocial factors, such as stress and musculoskeletal diseases that occur in the study of teachers in Germany were reported by Freude, Seibt, Pech and Ullsperger in 2005. Mazloumi et al. (2012) reported that the job demand is one of the risk factors to reduce work ability. Purnawati (2012) showed that there was an increase of 4.72 % WAI scores on national private bank employee in Denpasar, Bali after being given Ergo-JSI. This increase occurred because the Ergo-JSI change working conditions as well as changes in knowledge, attitudes and behavior of employees on matters relating to workplace stress and how to anticipate them. Table 9 showed that the mean work engagement score in first period was 57.99  13.20 and 67.69  11.37 on second period. Analysis of significance with t-paired test showed that the value of t = 9.15 and p = 0.001. This means that the mean score in both periods significantly different (p< 0.05).
The decline work engagement after work is consistent with what is stated by Sonnentag et al. (2010;within Bakker et al., 2012) that there is fluctuation of work engagement. Most of the previous studies that measured using the design work engagement between individuals and can not explain why even an employee who engaged high might have an off day and sometimes showed poor performance or below average. Researchers then tried to start measuring the change in the daily work engagement. It turns out people are not always engaged all day at work. There are days when employees feel more vigorous, absorbed, and dedicated than other days.
In the JD -R models mentioned that there are two main things that affect work engagement, namely job demands and job resources. Job demands was the initiator of the process of health improvement and job resources is the initiator of the process of motivation. Most of the studies showed that job resources are more important in determining a person's work engagement. However, in this study it can be proven otherwise that job demands can also define work engagement with Ergo-Psychophysiology intervention.
Ergo-Psychophysiology intervention can improve work engagement by reducing the task demand, create ergonomics work environment, making it more comfortable and safe at work.

FUTURE WORK
1. Ergo-psychophysiology need to be applied to similar types of work as it gives a good impact on employee performance. 2. Ergo-psychophysiology may be an option in improving employee performance.