Title: Assessment of bus driver's mental workload by Persian Driving Activity Load Index

Authors: Mohammad Babamiri; Fateme Rostami; Annie Pauzie; Majid Motamedzade; Maryam Feiz Arefi; Younes Mohammadi

Addresses: Department of Ergonomics, Research Center for Health Sciences, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran ' Department of Occupational Health, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran ' UGE/LESCOT, Department TS2, University of Gustave Eiffel, Laboratory Ergonomics & Cognitive Sciences in Transport, Bron Cedex, France ' Department of Ergonomics, Research Center for Health Sciences, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran ' Department of Occupational Health, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran ' Department of Epidemiology, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran

Abstract: Assessment of driver's mental workload by valid and easy to use instruments is an important issue. Accordingly, this study aims to assess mental workload by the Persian Driving Activity Load Index (DALI) and investigates psychometric properties of this index. The present study was descriptive and of psychometric studies' type. A total of 100 bus drivers were selected by available sampling method and answered to DALI and NASA-TLX questionnaires. For data analysis, factor analysis method, Cronbach's alpha coefficient and Pearson correlation were used by software SPSS version 22 and AMOS version 21. Factor analysis result showed that this questionnaire has good fitness indexes. Significant positive relationships between DALI and NASA-TLX questionnaires (r = 0.30 and p≤0.01) were obtained. Cronbach's alpha was 0.67 for DALI questionnaire, which was acceptable. Findings of the research showed that Persian version of the DALI questionnaire have good psychometric characteristic and it can be used as a valid instrument in this area of studies.

Keywords: mental workload; DALI; psychometric; driving.

DOI: 10.1504/IJVS.2021.10045630

International Journal of Vehicle Safety, 2021 Vol.12 No.2, pp.99 - 108

Accepted: 12 Apr 2021
Published online: 14 Mar 2022 *

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