988368
پنجشنبه 20 اردیبهشت 1403
چکیده: (50 مشاهده)
Background: The working situation of Railway Traffic Control Rooms (RTCR) employees makes them susceptible to human error. On the other hand, the occurrence of human error by these staff can lead to catastrophic events. Due to the lack of a standard questionnaire in estimating the probability of monthly human errors in employees of the RTCR, the present research was carried out to design and validate this tool.
Materials and Methods: In this mixed-method research, an initial questionnaire of 67 questions was designed with using the literature review and experts' experiences. To standardize and validate this questionnaire, the opinions of 15 experts consisting of university professors and experienced people working in control rooms were used. To determine the validity of the questionnaire, two indexes Content Validity Index (CVI) and Content Validity Ratio (CVR), were used. To check its reliability, the weighted kappa coefficient was used.
Results: Finally, all the initial questions were accepted and a final questionnaire with 67 questions was compiled in two sections for employees of the central control room and employees working in other RTCR. The CVI values of the questionnaire were 0.9, 0.9, and 0.92 in terms of simplicity, relevancy, and clarity, respectively, and its CVR value was 0.87. The reliability of this questionnaire was also proved by obtaining values of 73.71%, 87.14% and 80.31% for the minimum, maximum and average percentage of agreement between the questions, respectively.
Conclusion: According to the results, the designed questionnaire can estimate the probability of monthly human errors among RTCR employees and can be used in future studies.
Materials and Methods: In this mixed-method research, an initial questionnaire of 67 questions was designed with using the literature review and experts' experiences. To standardize and validate this questionnaire, the opinions of 15 experts consisting of university professors and experienced people working in control rooms were used. To determine the validity of the questionnaire, two indexes Content Validity Index (CVI) and Content Validity Ratio (CVR), were used. To check its reliability, the weighted kappa coefficient was used.
Results: Finally, all the initial questions were accepted and a final questionnaire with 67 questions was compiled in two sections for employees of the central control room and employees working in other RTCR. The CVI values of the questionnaire were 0.9, 0.9, and 0.92 in terms of simplicity, relevancy, and clarity, respectively, and its CVR value was 0.87. The reliability of this questionnaire was also proved by obtaining values of 73.71%, 87.14% and 80.31% for the minimum, maximum and average percentage of agreement between the questions, respectively.
Conclusion: According to the results, the designed questionnaire can estimate the probability of monthly human errors among RTCR employees and can be used in future studies.
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