Volume 3, Number 3 ( Journal of Occupational Hygiene Engineering, Autumn 2016)                   johe 2016, 3(3): 24-31 | Back to browse issues page


XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Charkhandaz Yeganeh R, Alimohammadi I, Abolghasemi J, Damiri Z, Parsazadeh B, Rahmani N. Validity and reliability of Verbal Online Subjective Opinion (VOSO) and Modified Cooper-Harper scales in measuring of mental workload. johe. 2016; 3 (3) :24-31
URL: http://johe.umsha.ac.ir/article-1-211-en.html

Associate professor in the occupational health department faculty of public health, iran university of medical sciences, tehran, iran , irajrastin1@gmail.com
Abstract:   (1122 Views)

Introduction: High mental workload is one of the important factors that results in errors in safety and occupational health scope and its measurement has high importance. So, this study aimed to determine validity and reliability of Verbal Online Subjective Opinion (VOSO) and Modified Cooper-Harper (MCH) scales in measuring mental workload.

Methods: This study was conducted on 90 male students of Iran University of Medical Sciences. In this study, the Forward-Backward translation was used for translation of scales. Moreover, Content Validity Ratio (CVR) and Content Validity Index (CVI) were calculated by having suggestion of 6 Ergonomics and Occupational health experts. The Hybrid Memory Search Task software was used to create mental workload. Convergent validity of scales was calculated using correlation of scales with reaction time and then Test-Retest method was used to determine the reliability of scales.

Results: Content and convergent validity of scales were confirmed and correlation of both scales with reaction time were higher than 0.8. Moreover for determination of scales reliabilities, Pearson correlation coefficient between scales values in test and retest trials were 0.86 and 0.91 for VOSO and MCH respectively.

Conclusion: It seems that in regard to confirmation of validity and reliability of VOSO and MCH in this study and their high correlation with reaction time, it can use these scales in measurement of mental workload.

Full-Text [PDF 237 kb]   (303 Downloads)    
Type of Study: Research Article | Subject: Special

Add your comments about this article : Your username or email:
Write the security code in the box

Send email to the article author


© 2015 All Rights Reserved | Journal of Occupational Hygiene Engineering

Designed & Developed by : Yektaweb