جستجوی مقالات مرتبط با کلیدواژه « mental work load » در نشریات گروه « پزشکی »

One of the factors affecting the performance of video display terminal users is their mental work load. Since low sleep quality causes fault and decreased accuracy in work, this study aimed to evaluate the relationship between mental work load and sleep quality in video display terminals users. This descriptive cross-sectional study was performed on 191 video display terminal users. National Aeronautics and Space Administration Task Load Index questionnaire (NASA TLX) which is a six-dimensional tool and measures mental, physical, temporal, performance, Frustration and Effort demands, was used in the study. For evaluation of sleep quality, Pittsburgh Sleep Quality questionnaire was used. Data were analyzed by descriptive statistics, independent T-test, one way ANOVA, Pearson correlation coefficient and regression analysis in SPSS version 20 software. Mean score of sleep quality and mean of overall mental work load were 6.29±2.67 and 66.61±17.69, respectively. Pearson correlation coefficient showed no significant relationship between mental work load and sleep quality (p=0.34, r=-0.06). Independent T-test showed that there was a significant difference in sleep quality between males and females (p=0.001). 39.2% of participants demonstrated good sleep quality, 4/52% relatively low quality and 4/8% low sleep quality. NASA-TLX showed that the lowest and highest scores of six scales were related to physical demand (16.27±22.43) and mental demand (78.57±21.31), respectively. In this study, there was no significant relationship between mental work load and sleep quality. Since mental work load was high in video display terminal users, use of effective programs to reduce the mental work load seems to be essential for these users.

Considering the importance and high prevalence of musculoskeletal disorders, this study aimed to investigate the role of mental workload, fatigue, and sleep quality in the development of musculoskeletal disorders. This study included 243 employees working at Borujerd health center. The participants were selected based on simple random sampling. The data were collected using the Cornell Musculoskeletal Disorders Questionnaire, Sophie Fatigue Questionnaire, and Pittsburgh Sleep Quality Questionnaire. Moreover, the Subjective Workload Assessment Technique was utilized to evaluate the mental workload. The data were analyzed using SPSS software (Version 18) through the Pearson correlation coefficient, the Chi-square test, and regression analysis. According to the results of this study, back pain was ranked as the most prevalent disorder. The results of the correlation analysis showed a significant association between mental workload and fatigue with musculoskeletal disorders (P≤0.05). Moreover, a significant relationship was observed between sleep quality and musculoskeletal disorders (P≤0.05). It can be concluded that reduced workload and fatigue, as well as improved sleep quality, can decrease the risk of musculoskeletal disorders among the staff.

Mental workload is one of the affecting factors in efficiency and performance of therapist in the workplace. Neuro feedback is a new modality for improvement of healthy person's daily activity and its quality. The aim of this study is evaluation of neurofeedback effects on mental work load in occupational therapists.
This study has experimental design with pre-post test, experimental- fake group and was performed on 22 occupational therapists. Subjects were divided into two real neuro feedback and mock neuro feedback (placebo) groups. Both groups were treated with neuro feedback for 12 sessions. NASA (task load index) was used to assess both groups before and after the treatment. Effect size and improvement percentage were used to analyze the collected data.
The results of the improvement percentage showed that mental need and hopelessness subscales in real neuro feedback have more than 15% difference in comparison with mock neuro feedback that indicate clinical significant. Effect size in the real neuro feedback on mental need subscale was great and in time need and hopelessness subscales were average. Effect size in mock neuro feedback on total subscales was low.
The effectiveness of real neuro feedback was not due to the changes in the placebo. It can be as a complementary decreasing in the mental work load.

One of the factors affecting the behavior and performance of nurses in the workplace is mental work load. This study aimed to assess the mental work load and risk factors on intensive care unit nurses. This descriptive cross-sectional study was performed on 163 nursing employed in hospitals in Isfahan, Iran. For collecting data, National Aeronautics and Space Administration Task Load Index (NASA-TLX), measuring mental load specialized questionnaire was used. The data collected from the questionnaire was entered the NASA-TLX software and the final score of mental work load was determined. Spearman correlation test showed no significant relationship between the variables of subjective and mental work load. But, correlation was significant between the number of cared patients by a nurse on each shift and scores of mental work load in critical care unit nursing (P = 0.004). NASA-TLX showed that the lowest score of six scales was of temporal demand (63.56) and the highest scores was for mental demand (83.50). Based on our findings, the mental work load was high in nursing critical care unit. Therefore, using intervention strategies to reduce mental work load in this group seems to be necessary.