The appraisal of reliability and validity of subjective workload assessment technique and NASA-task load index / 中华劳动卫生职业病杂志
Chinese Journal of Industrial Hygiene and Occupational Diseases
; (12): 178-181, 2005.
Article
in Zh
| WPRIM
| ID: wpr-346539
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To test the reliability and validity of two mental workload assessment scales, i.e. subjective workload assessment technique (SWAT) and NASA task load index (NASA-TLX).</p><p><b>METHODS</b>One thousand two hundred and sixty-eight mental workers were sampled from various kinds of occupations, such as scientific research, education, administration and medicine, etc, with randomized cluster sampling. The re-test reliability, split-half reliability, Cronbach's alpha coefficient and correlation coefficients between item score and total score were adopted to test the reliability. The test of validity included structure validity.</p><p><b>RESULTS</b>The re-test reliability coefficients of these two scales and their items were ranged from 0.516 to 0.753 (P < 0.01), indicating the two scales had good re-test reliability; the split-half reliability of SWAT was 0.645, and its Cronbach's alpha coefficient was more than 0.80, all the correlation coefficients between its items score and total score were more than 0.70; as for NASA-TLX, both the split-half reliability and Cronbach's alpha coefficient were more than 0.80, the correlation coefficients between its items score and total score were all more than 0.60 (P < 0.01) except the item of performance. Both scales had good inner consistency. The Pearson correlation coefficient between the two scales was 0.492 (P < 0.01), implying the results of the two scales had good consistency. Factor analysis showed that the two scales had good structure validity.</p><p><b>CONCLUSION</b>Both SWAT and NASA-TLX have good reliability and validity and may be used as a valid tool to assess mental workload in China after being revised properly.</p>
Full text:
1
Index:
WPRIM
Main subject:
Reference Standards
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Self-Assessment
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Task Performance and Analysis
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Surveys and Questionnaires
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Reproducibility of Results
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Sampling Studies
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Occupational Health
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Workload
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Mental Competency
Type of study:
Clinical_trials
Limits:
Adolescent
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Adult
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Aged
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Female
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Humans
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Male
Language:
Zh
Journal:
Chinese Journal of Industrial Hygiene and Occupational Diseases
Year:
2005
Type:
Article