ISSN : 1229-0696
We are concerned with the fact that workload can reduce a person’s ability to drive safely, thereby potentially causing serious traffic accidents. As such, we performed this study to determine which factors significantly effect a driver’s subjective workload. We used the Driving Behavior Determinants, Driving Confidence Level Questionnaire, subjective workload assessment tools(NASA-TLX, DALI(Driving Activity Load Index)). A total of 227 drivers, with an average age of 35 and average driving experience of 9 years, were asked to complete the questionnaires. Many researchers have utilized the Driving Behavior Determinants and Driving Confidence Level Questionnaire as tools for elucidating driver characteristics. Additionally, the factors examined by these tools have been demonstrated in several studies to have an influence on a person’s driving behavior such as speed. The NASA-TLX and DALI are also known as self-assessment tools for subjective workload. We conducted a correlation analysis between Driving Behavior Determinants and Driving Confidence Level and driver’s subjective workload level. The results indicated that ‘Lack of Interpersonal Adaptability’ and ‘Insensibility’ had a significant correlation with a driver’s subjective workload. We also conducted a factor analysis among 29 questionnaires which were related to a driver’s subjective workload. The results revealed that the 29 questionnaires could be divided to three factors (i.e. Situational Inadaptability, Interpersonal Inadaptability, Risk Taking Personality). In addition, Interpersonal Inadaptability and Risk Taking Personality factors also had significant effects on the DALI workload level. Of these factors, Situational Inadaptability factor had significant effects on NASA-TLX workload level. The purpose of this study was to determine a way of reducing a driver`s workload in advance and to provide people with an understanding of the theoretical driving workload. Given the results indicating specific factors affecting subjective workload, we expect that the results of this study will help drivers and researchers manage driving workload.
김종회, 오주석, 이순철 (2006). 운전행동결정요인이 위반행동 및 사고에 미치는 영향. 한국심리학회지: 산업 및 조직, 19, 349 -369.
도로교통안전관리공단 (1998). 노년층 교통참가자의 운전행동 및 교육내용에 관한 연구.
오주석, 박선진, 이순철 (2009). 운전행동결정요인과 직무만족이 택시운전자의 위험운전행동에 미치는 영향. 한국심리학회지: 산업 및 조직, 22(1), 71-86.
이순열, 이순철, 박선진 (2006). 운전확신수준의 변화가 연령별 운전행동에 미치는 영향. 한국심리학회지: 사회문제, 12, 23-47.
이순열, 이순철 (2007). 음주 운전자들의 운전확신수준 특성이 교통사고에 미치는 영향: 경로분석을 이용한 연구. 한국심리학회지: 산업및조직, 20(1), 111-125.
이순철, 오주석 (2007). 운전행동결정요인이 위험운전, 주의행동 및 피로대처에 미치는 영향. 한국심리학회지: 산업 및 조직, 20, 395-414.
이순철, 황윤숙, 오주석 (2008). 작업부하가 화물차운전자의 피로에 미치는 영향. 한국심리학회지: 산업 및 조직. 21(2). 367-381.
황윤숙, 오주석, 이순철 (2009). 시내버스 및 택시운전자의 작업부하가 피로에 미치는 영향과 부적정서상태의 매개효과. 한국심리학회지: 산업 및 조직, 22(1), 87-108.
Caplan, R, D., Jones, K, W. (1975), Effects of work load, role ambiguity, and Type A personality on anxiety, depression, and heart rate. Journal of Applied Psychology. 60(6), 713-719.
Edland, A., & Svenson, O. (1993). Judgment and decision making under time pressure: Studies and findings. Time pressure and stress in human judgment and decision making(27-40). New York: Plenum Press.
Esther, R, G., Ronald J. B., Kathleen A, M. (2003). Reactions to Increased Workload: Effects on Professional Efficacy of Nurses. International Association for Applied Psychology, 20, 61-86.
Katila, A., Keskinen, E. Hatakka, M. (1996). Conflicting goals of skid training. Accident Analysis and Prevention. 28, 785–789.
Pauzie (2008). A method to assess the driver mental workload: The driving activity load index(DALI). IET Intelligent Transport Systems, 2(4), 315-322.
Rantanen, E, M., Goldberg, J, H. (1999). The effect of mental workload on the visual field size and shape. Ergonomics. 42(6), 816-834.
Recarte, M, A., & Nunes, L, M. (2003). Mental workload while driving: Effects on visual search, discrimination, and decision making. Journal of Experimental Psychology: Applied. 9(2), 119-137.
Rose, C, L., Murphy L, B., Byard, L., Nikzad, K. (2002). The role of the Big Five personality factors in vigilance performance and workload. European Journal of Personality, 16(3), 185-200.