Yahya Khosravi - Academia.edu (original) (raw)

Papers by Yahya Khosravi

Research paper thumbnail of اپيدميولوژی حوادث ناشی از کار در کارگران معادن ذغال سنگ استان کرمان در طول سالهای 1370 الی 1385

سلامت کار ایران, 2011

زمينه و هدف: ساليانه در جهان ميليونها کارگر قربانی حوادث ناشی از کار میشوند که منجر به فوت يا از ... more زمينه و هدف: ساليانه در جهان ميليونها کارگر قربانی حوادث ناشی از کار میشوند که منجر به فوت يا از کارافتادگی تعداد زيادی از آنان میگردد. کارگران معادن ذغال سنگ به اقتضای شغلی بيشتر در معرض خطر حوادث ناشی از کار قرار دارند. با توجه به اهميت سلامت نيروهای کارآمد جامعه و پيشگيری از حوادث زيانآور، اين پژوهش با هدف تجزيه تحليل حوادث ناشی از کار در کارگران معادن ذغال سنگ استان کرمان در طول سالهای 1370 الی 1385 صورت گرفت. روش بررسی: در اين مطالعه توصيفی اطلاعات حوادث ثبت شده و تائيد شده موجود در دفاتر معادن ذغال سنگ استان کرمان در طی سالهای 85 ...

Research paper thumbnail of Occupational cognitive failure and its relationship with unsafe behaviors and accidents

International Journal of Occupational Safety and Ergonomics Jose, 2014

The aim of this study was to assess the relationship between occupational cognitive failures (OCF... more The aim of this study was to assess the relationship between occupational cognitive failures (OCFs) and unsafe behaviors, accidents and driving offences among municipal bus drivers in Tehran, Iran. Systematic random sampling was used to select 190 drivers from 3 transport and traffic Tehran districts. Data were collected with the occupational cognitive failure questionnaire (OCFQ), the driver behavior questionnaire and a data collection form. The mean (SD) numbers of driving-related offences and road traffic accidents were 1.5 (2.6) and 0.37 (1.0), respectively. The mean (SD) numbers of deliberate driving violations, unintended violations, driving slips and mistakes were 6.97 (5.5), 1.61 (1.5), 13.6 (9.0) and 4.53 (3.28), respectively. The mean (SD) number of the OCFs was 28.9 (20.5). A significant correlation was found between occupational cognitive error and unsafe driving behavior subscales. The stepwise logistic regression results showed that, while controlling the effects of confounding factors, the OCF predicts 6%, 9%, 15% and 9% of deliberate violations, unintended violations, driving slips and driving mistakes, respectively. The results of this study show that the score of the OCFQ is a predictor of unsafe driving behaviors and its subscales.

Research paper thumbnail of Factors Influencing Unsafe Behaviors and Accidents on Construction Sites: A Review

International Journal of Occupational Safety and Ergonomics Jose, 2014

OBJECTIVE: Construction is a hazardous occupation due to the unique nature of activities involved... more OBJECTIVE: Construction is a hazardous occupation due to the unique nature of activities involved and the repetitiveness of several field behaviors. The aim of this methodological and theoretical review is to explore the empirical factors influencing unsafe behaviors and accidents on construction sites.METHODS: In this work, results and findings from 56 related previous studies were investigated. These studies were categorized based on their design, type, methods of data collection, analytical methods, variables, and key findings. A qualitative content analysis procedure was used to extract variables, themes, and factors. In addition, all studies were reviewed to determine the quality rating and to evaluate the strength of provided evidence.RESULTS: The content analysis identified 8 main categories: (a) society, (b) organization, (c) project management, (d) supervision, (e) contractor, (f) site condition, (g) work group, and (h) individual characteristics. The review highlighted the importance of more distal factors, e.g., society and organization, and project management, that may contribute to reducing the likelihood of unsafe behaviors and accidents through the promotion of site condition and individual features (as proximal factors).CONCLUSION: Further research is necessary to provide a better understanding of the links between unsafe behavior theories and empirical findings, challenge theoretical assumptions, develop new applied theories, and make stronger recommendations.

Research paper thumbnail of Modeling the Factors Affecting Unsafe Behavior in the Construction Industry from Safety Supervisors' Perspective

There can be little doubt that the construction is the most hazardous industry in the worldwide. ... more There can be little doubt that the construction is the most hazardous industry in the worldwide. This study was designed to modeling the factors affecting unsafe behavior from the perspective of safety supervisors. The qualitative research was conducted to extract a conceptual model. A structural model was then developed based on a questionnaire survey (n=266) by two stage Structural Equation Model (SEM) approach. An excellent confirmed 12-factors structure explained about 62% of variances unsafe behavior in the construction industry. A good fit structural model indicated that safety climate factors were positively correlated with safety individual factors (P<0.001) and workplace safety condition (P<0.001). The workplace safety condition was found to play a strong mediating role in linking the safety climate and construction workers' engagement in safe or unsafe behavior. In order to improve construction safety performance, more focus on the workplace condition is required.

Research paper thumbnail of Structural modeling of safety performance in construction industry

Iranian Journal of Public Health

With rapid economic development and industrialization, the construction industry continues to ran... more With rapid economic development and industrialization, the construction industry continues to rank among the most hazardous industries in the world. Therefore, construction safety is always a significant concern for both practitioners and researchers. The objective of this study was to create a structural modeling of components that influence the safety performance in construction projects. We followed a two-stage Structural Equation Model based on a questionnaire study (n=230). In the first stage, we applied the Structural Equation Model to the proposed model to test the validity of the observed variables of each latent variable. In the next stage, we modified the proposed model. The LISREL 8.8 software was used to conduct the analysis of the structural model. A good-fit structural model (Goodness of Fit Index=0.92; Root Mean Square Residual=0.04; Root Mean Square Error of Approximation=0.04; Comparative Fit Index=0.98; Normalized Fit Index=0.96) indicated that social and organizational constructs influence safety performance via the general component of the safety climate. The new structural model can be used to provide better understanding of the links between safety performance indicators and contributing components, and make stronger recommendations for effective intervention in construction projects.

Research paper thumbnail of Why construction workers involve in unsafe behavior? Validity and reliability study of a new instrument

Iran Occupational Health

ABSTRACT

Research paper thumbnail of Why construction workers involve in unsafe behavior? Development and cross-validation of a structural model

Iran Occupational Health

ABSTRACT

Research paper thumbnail of Development and Evaluation of a New Questionnaire for Rating of Cognitive Failures at Work

Cognitive-based human errors have major contribution to performance and safety in working environ... more Cognitive-based human errors have major contribution to performance and safety in working environment. This study designed to develop a measurement tool in order to evaluate this type of errors in the occupational settings. An Occupational Cognitive Failure Questionnaire (OCFQ) was developed. Content validity of the OCFQ was performed using a quantitative approach. Reliability of questionnaire was assessed by internal consistency and test-retest methods. A preliminary list of 35-items was prepared as a starting point. After evaluation of validity, five items were rejected. The new measurement instrument with 30-items was finally developed. The content validity index (CVI) for the final OCFQ was found acceptable (CVI=0.7). Results show that final OCFQ was internally consistent (α=96) and intraclass correlation coefficients (ICC) was 0.99. Measurement of cognitive failure in the workplace requires a valid and reliable tool. In respect to probable outcomes of cognitive failures occurrence at work, the present study suggested that OCFQ would be a useful instrument for measurement of cognitive failure in the working environment.

Research paper thumbnail of Structural modeling of safety performance in construction industry

Iranian journal of public health, 2014

With rapid economic development and industrialization, the construction industry continues to ran... more With rapid economic development and industrialization, the construction industry continues to rank among the most hazardous industries in the world. Therefore, construction safety is always a significant concern for both practitioners and researchers. The objective of this study was to create a structural modeling of components that influence the safety performance in construction projects. We followed a two-stage Structural Equation Model based on a questionnaire study (n=230). In the first stage, we applied the Structural Equation Model to the proposed model to test the validity of the observed variables of each latent variable. In the next stage, we modified the proposed model. The LISREL 8.8 software was used to conduct the analysis of the structural model. A good-fit structural model (Goodness of Fit Index=0.92; Root Mean Square Residual=0.04; Root Mean Square Error of Approximation=0.04; Comparative Fit Index=0.98; Normalized Fit Index=0.96) indicated that social and organizat...

Research paper thumbnail of Occupational cognitive failure and its relationship with unsafe behaviors and accidents

International journal of occupational safety and ergonomics : JOSE, 2014

The aim of this study was to assess the relationship between occupational cognitive failures (OCF... more The aim of this study was to assess the relationship between occupational cognitive failures (OCFs) and unsafe behaviors, accidents and driving offences among municipal bus drivers in Tehran, Iran. Systematic random sampling was used to select 190 drivers from 3 transport and traffic Tehran districts. Data were collected with the occupational cognitive failure questionnaire (OCFQ), the driver behavior questionnaire and a data collection form. The mean (SD) numbers of driving-related offences and road traffic accidents were 1.5 (2.6) and 0.37 (1.0), respectively. The mean (SD) numbers of deliberate driving violations, unintended violations, driving slips and mistakes were 6.97 (5.5), 1.61 (1.5), 13.6 (9.0) and 4.53 (3.28), respectively. The mean (SD) number of the OCFs was 28.9 (20.5). A significant correlation was found between occupational cognitive error and unsafe driving behavior subscales. The stepwise logistic regression results showed that, while controlling the effects of co...

Research paper thumbnail of Modeling the factors affecting unsafe behavior in the construction industry from safety supervisors' perspective

Journal of research in health sciences, 2014

There can be little doubt that the construction is the most hazardous industry in the worldwide. ... more There can be little doubt that the construction is the most hazardous industry in the worldwide. This study was designed to modeling the factors affecting unsafe behavior from the perspective of safety supervisors. The qualitative research was conducted to extract a conceptual model. A structural model was then developed based on a questionnaire survey (n=266) by two stage Structural Equation Model (SEM) approach. An excellent confirmed 12-factors structure explained about 62% of variances unsafe behavior in the construction industry. A good fit structural model indicated that safety climate factors were positively correlated with safety individual factors (P<0.001) and workplace safety condition (P<0.001). The workplace safety condition was found to play a strong mediating role in linking the safety climate and construction workers' engagement in safe or unsafe behavior. In order to improve construction safety performance, more focus on the workplace condition is required.

Research paper thumbnail of Factors Influencing Unsafe Behaviors and Accidents on Construction Sites: A Review

International Journal of Occupational Safety and Ergonomics, 2014

Construction is a hazardous occupation due to the unique nature of activities involved and the re... more Construction is a hazardous occupation due to the unique nature of activities involved and the repetitiveness of several field behaviors. The aim of this methodological and theoretical review is to explore the empirical factors influencing unsafe behaviors and accidents on construction sites. In this work, results and findings from 56 related previous studies were investigated. These studies were categorized based on their design, type, methods of data collection, analytical methods, variables, and key findings. A qualitative content analysis procedure was used to extract variables, themes, and factors. In addition, all studies were reviewed to determine the quality rating and to evaluate the strength of provided evidence. The content analysis identified 8 main categories: (a) society, (b) organization, (c) project management, (d) supervision, (e) contractor, (f) site condition, (g) work group, and (h) individual characteristics. The review highlighted the importance of more distal factors, e.g., society and organization, and project management, that may contribute to reducing the likelihood of unsafe behaviors and accidents through the promotion of site condition and individual features (as proximal factors). Further research is necessary to provide a better understanding of the links between unsafe behavior theories and empirical findings, challenge theoretical assumptions, develop new applied theories, and make stronger recommendations.

Research paper thumbnail of Occupational Cognitive Failures and Safety Performance in the Workplace

International Journal of Occupational Safety and Ergonomics, 2014

Introduction. The majority of industrial accidents occur because of human errors. Human error has... more Introduction. The majority of industrial accidents occur because of human errors. Human error has different causes, however, in all cases cognitive abilities and limitations of human play an important role. Occupational cognitive failures are cognitively-based human errors that occur at work. The aim of this study was to examine the relationship between occupational cognitive failures and safety consequences. Method. Personnel of a large industrial company in Iran filled out an occupational cognitive failure questionnaire (OCFQ) and answered questions on accidents. Univariate and multiple logistic regression analysis were used to determine the relationship between cognitive failures and safety consequences. Results. According to developed regression models, personnel with a high rate of cognitive failure, in comparison to low rate, have a high risk of minor injury involvement (OR 5.1, 95% CI [2.62, 10.3]); similar results were for major injury and near miss. Discussion. The results of this study revealed usefulness of the OCFQ as a tool of predicting safetyrelated consequences and planning preventive actions.

Research paper thumbnail of The survey of relationship between occupational cognitive failures and safety performance among bus drivers

Research paper thumbnail of Identifying individual and work-related risk factors of musculoskeletal disorders in an industrial organization

Research paper thumbnail of Why construction workers involve in unsafe behaviors? Part A: A qualitative research

Research paper thumbnail of Health, Safety and Environment (HSE) assessment of neighborhoods: A case study in Tehran Municipality

Urbanization is growing rapidly in recent centuries. This phenomenon can cause many changes in va... more Urbanization is growing rapidly in recent centuries. This phenomenon can cause many changes in various aspects of human life including the economy, education and public health This study was conducted to assess the Health, Safety and Environment (HSE) problems in Tehran neighborhoods. A new instrument was developed based on the results of a literature review and formulated during a pilot study. Through cluster sampling, 10 neighborhoods were selected based from 374 neighborhoods of Tehran. Six observers completed observational items during the field studies. Secondary data were used to obtain non-observation characteristics. Standard descriptive statistics were used to compare the HSE characteristics in sampled neighborhoods. Furthermore, control chart was used to as a decision rule to identify specific variation among sampled neighborhoods. Niavaran neighborhood had the best HSE status (52.80%±25.03) whereas Khak Sefid neighborhood had the worst one (20.09%±27.51). Standard deviations of HSE characteristics were high in different parts of a neighborhood. Statistical analysis indicated that significant differences in HSE characteristics exist among sampled neighborhoods. HSE status was in warning situation in both rich and poor neighborhoods. Community-based interventions were suggested as health promotion programs to involve and empower people in neighborhoods.

Research paper thumbnail of Development of an Occupational Cognitive Failure Questionnaire (OCFQ): Evaluation validity and reliability

Research paper thumbnail of Development and evaluation of a new questionnaire for rating perceived participation1

Clinical Rehabilitation, 2007

Cognitive-based human errors have major contribution to performance and safety in working environ... more Cognitive-based human errors have major contribution to performance and safety in working environment. This study designed to develop a measurement tool in order to evaluate this type of errors in the occupational settings. An Occupational Cognitive Failure Questionnaire (OCFQ) was developed. Content validity of the OCFQ was performed using a quantitative approach. Reliability of questionnaire was assessed by internal consistency and test-retest methods. A preliminary list of 35-items was prepared as a starting point. After evaluation of validity, five items were rejected. The new measurement instrument with 30-items was finally developed. The content validity index (CVI) for the final OCFQ was found acceptable (CVI=0.7). Results show that final OCFQ was internally consistent (α=96) and intraclass correlation coefficients (ICC) was 0.99. Measurement of cognitive failure in the workplace requires a valid and reliable tool. In respect to probable outcomes of cognitive failures occurrence at work, the present study suggested that OCFQ would be a useful instrument for measurement of cognitive failure in the working environment.

Research paper thumbnail of The Role of HSE management System in Improving health, safety and environment performance in an Oil Organization

Research paper thumbnail of اپيدميولوژی حوادث ناشی از کار در کارگران معادن ذغال سنگ استان کرمان در طول سالهای 1370 الی 1385

سلامت کار ایران, 2011

زمينه و هدف: ساليانه در جهان ميليونها کارگر قربانی حوادث ناشی از کار میشوند که منجر به فوت يا از ... more زمينه و هدف: ساليانه در جهان ميليونها کارگر قربانی حوادث ناشی از کار میشوند که منجر به فوت يا از کارافتادگی تعداد زيادی از آنان میگردد. کارگران معادن ذغال سنگ به اقتضای شغلی بيشتر در معرض خطر حوادث ناشی از کار قرار دارند. با توجه به اهميت سلامت نيروهای کارآمد جامعه و پيشگيری از حوادث زيانآور، اين پژوهش با هدف تجزيه تحليل حوادث ناشی از کار در کارگران معادن ذغال سنگ استان کرمان در طول سالهای 1370 الی 1385 صورت گرفت. روش بررسی: در اين مطالعه توصيفی اطلاعات حوادث ثبت شده و تائيد شده موجود در دفاتر معادن ذغال سنگ استان کرمان در طی سالهای 85 ...

Research paper thumbnail of Occupational cognitive failure and its relationship with unsafe behaviors and accidents

International Journal of Occupational Safety and Ergonomics Jose, 2014

The aim of this study was to assess the relationship between occupational cognitive failures (OCF... more The aim of this study was to assess the relationship between occupational cognitive failures (OCFs) and unsafe behaviors, accidents and driving offences among municipal bus drivers in Tehran, Iran. Systematic random sampling was used to select 190 drivers from 3 transport and traffic Tehran districts. Data were collected with the occupational cognitive failure questionnaire (OCFQ), the driver behavior questionnaire and a data collection form. The mean (SD) numbers of driving-related offences and road traffic accidents were 1.5 (2.6) and 0.37 (1.0), respectively. The mean (SD) numbers of deliberate driving violations, unintended violations, driving slips and mistakes were 6.97 (5.5), 1.61 (1.5), 13.6 (9.0) and 4.53 (3.28), respectively. The mean (SD) number of the OCFs was 28.9 (20.5). A significant correlation was found between occupational cognitive error and unsafe driving behavior subscales. The stepwise logistic regression results showed that, while controlling the effects of confounding factors, the OCF predicts 6%, 9%, 15% and 9% of deliberate violations, unintended violations, driving slips and driving mistakes, respectively. The results of this study show that the score of the OCFQ is a predictor of unsafe driving behaviors and its subscales.

Research paper thumbnail of Factors Influencing Unsafe Behaviors and Accidents on Construction Sites: A Review

International Journal of Occupational Safety and Ergonomics Jose, 2014

OBJECTIVE: Construction is a hazardous occupation due to the unique nature of activities involved... more OBJECTIVE: Construction is a hazardous occupation due to the unique nature of activities involved and the repetitiveness of several field behaviors. The aim of this methodological and theoretical review is to explore the empirical factors influencing unsafe behaviors and accidents on construction sites.METHODS: In this work, results and findings from 56 related previous studies were investigated. These studies were categorized based on their design, type, methods of data collection, analytical methods, variables, and key findings. A qualitative content analysis procedure was used to extract variables, themes, and factors. In addition, all studies were reviewed to determine the quality rating and to evaluate the strength of provided evidence.RESULTS: The content analysis identified 8 main categories: (a) society, (b) organization, (c) project management, (d) supervision, (e) contractor, (f) site condition, (g) work group, and (h) individual characteristics. The review highlighted the importance of more distal factors, e.g., society and organization, and project management, that may contribute to reducing the likelihood of unsafe behaviors and accidents through the promotion of site condition and individual features (as proximal factors).CONCLUSION: Further research is necessary to provide a better understanding of the links between unsafe behavior theories and empirical findings, challenge theoretical assumptions, develop new applied theories, and make stronger recommendations.

Research paper thumbnail of Modeling the Factors Affecting Unsafe Behavior in the Construction Industry from Safety Supervisors' Perspective

There can be little doubt that the construction is the most hazardous industry in the worldwide. ... more There can be little doubt that the construction is the most hazardous industry in the worldwide. This study was designed to modeling the factors affecting unsafe behavior from the perspective of safety supervisors. The qualitative research was conducted to extract a conceptual model. A structural model was then developed based on a questionnaire survey (n=266) by two stage Structural Equation Model (SEM) approach. An excellent confirmed 12-factors structure explained about 62% of variances unsafe behavior in the construction industry. A good fit structural model indicated that safety climate factors were positively correlated with safety individual factors (P&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;0.001) and workplace safety condition (P&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;0.001). The workplace safety condition was found to play a strong mediating role in linking the safety climate and construction workers&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; engagement in safe or unsafe behavior. In order to improve construction safety performance, more focus on the workplace condition is required.

Research paper thumbnail of Structural modeling of safety performance in construction industry

Iranian Journal of Public Health

With rapid economic development and industrialization, the construction industry continues to ran... more With rapid economic development and industrialization, the construction industry continues to rank among the most hazardous industries in the world. Therefore, construction safety is always a significant concern for both practitioners and researchers. The objective of this study was to create a structural modeling of components that influence the safety performance in construction projects. We followed a two-stage Structural Equation Model based on a questionnaire study (n=230). In the first stage, we applied the Structural Equation Model to the proposed model to test the validity of the observed variables of each latent variable. In the next stage, we modified the proposed model. The LISREL 8.8 software was used to conduct the analysis of the structural model. A good-fit structural model (Goodness of Fit Index=0.92; Root Mean Square Residual=0.04; Root Mean Square Error of Approximation=0.04; Comparative Fit Index=0.98; Normalized Fit Index=0.96) indicated that social and organizational constructs influence safety performance via the general component of the safety climate. The new structural model can be used to provide better understanding of the links between safety performance indicators and contributing components, and make stronger recommendations for effective intervention in construction projects.

Research paper thumbnail of Why construction workers involve in unsafe behavior? Validity and reliability study of a new instrument

Iran Occupational Health

ABSTRACT

Research paper thumbnail of Why construction workers involve in unsafe behavior? Development and cross-validation of a structural model

Iran Occupational Health

ABSTRACT

Research paper thumbnail of Development and Evaluation of a New Questionnaire for Rating of Cognitive Failures at Work

Cognitive-based human errors have major contribution to performance and safety in working environ... more Cognitive-based human errors have major contribution to performance and safety in working environment. This study designed to develop a measurement tool in order to evaluate this type of errors in the occupational settings. An Occupational Cognitive Failure Questionnaire (OCFQ) was developed. Content validity of the OCFQ was performed using a quantitative approach. Reliability of questionnaire was assessed by internal consistency and test-retest methods. A preliminary list of 35-items was prepared as a starting point. After evaluation of validity, five items were rejected. The new measurement instrument with 30-items was finally developed. The content validity index (CVI) for the final OCFQ was found acceptable (CVI=0.7). Results show that final OCFQ was internally consistent (α=96) and intraclass correlation coefficients (ICC) was 0.99. Measurement of cognitive failure in the workplace requires a valid and reliable tool. In respect to probable outcomes of cognitive failures occurrence at work, the present study suggested that OCFQ would be a useful instrument for measurement of cognitive failure in the working environment.

Research paper thumbnail of Structural modeling of safety performance in construction industry

Iranian journal of public health, 2014

With rapid economic development and industrialization, the construction industry continues to ran... more With rapid economic development and industrialization, the construction industry continues to rank among the most hazardous industries in the world. Therefore, construction safety is always a significant concern for both practitioners and researchers. The objective of this study was to create a structural modeling of components that influence the safety performance in construction projects. We followed a two-stage Structural Equation Model based on a questionnaire study (n=230). In the first stage, we applied the Structural Equation Model to the proposed model to test the validity of the observed variables of each latent variable. In the next stage, we modified the proposed model. The LISREL 8.8 software was used to conduct the analysis of the structural model. A good-fit structural model (Goodness of Fit Index=0.92; Root Mean Square Residual=0.04; Root Mean Square Error of Approximation=0.04; Comparative Fit Index=0.98; Normalized Fit Index=0.96) indicated that social and organizat...

Research paper thumbnail of Occupational cognitive failure and its relationship with unsafe behaviors and accidents

International journal of occupational safety and ergonomics : JOSE, 2014

The aim of this study was to assess the relationship between occupational cognitive failures (OCF... more The aim of this study was to assess the relationship between occupational cognitive failures (OCFs) and unsafe behaviors, accidents and driving offences among municipal bus drivers in Tehran, Iran. Systematic random sampling was used to select 190 drivers from 3 transport and traffic Tehran districts. Data were collected with the occupational cognitive failure questionnaire (OCFQ), the driver behavior questionnaire and a data collection form. The mean (SD) numbers of driving-related offences and road traffic accidents were 1.5 (2.6) and 0.37 (1.0), respectively. The mean (SD) numbers of deliberate driving violations, unintended violations, driving slips and mistakes were 6.97 (5.5), 1.61 (1.5), 13.6 (9.0) and 4.53 (3.28), respectively. The mean (SD) number of the OCFs was 28.9 (20.5). A significant correlation was found between occupational cognitive error and unsafe driving behavior subscales. The stepwise logistic regression results showed that, while controlling the effects of co...

Research paper thumbnail of Modeling the factors affecting unsafe behavior in the construction industry from safety supervisors' perspective

Journal of research in health sciences, 2014

There can be little doubt that the construction is the most hazardous industry in the worldwide. ... more There can be little doubt that the construction is the most hazardous industry in the worldwide. This study was designed to modeling the factors affecting unsafe behavior from the perspective of safety supervisors. The qualitative research was conducted to extract a conceptual model. A structural model was then developed based on a questionnaire survey (n=266) by two stage Structural Equation Model (SEM) approach. An excellent confirmed 12-factors structure explained about 62% of variances unsafe behavior in the construction industry. A good fit structural model indicated that safety climate factors were positively correlated with safety individual factors (P<0.001) and workplace safety condition (P<0.001). The workplace safety condition was found to play a strong mediating role in linking the safety climate and construction workers' engagement in safe or unsafe behavior. In order to improve construction safety performance, more focus on the workplace condition is required.

Research paper thumbnail of Factors Influencing Unsafe Behaviors and Accidents on Construction Sites: A Review

International Journal of Occupational Safety and Ergonomics, 2014

Construction is a hazardous occupation due to the unique nature of activities involved and the re... more Construction is a hazardous occupation due to the unique nature of activities involved and the repetitiveness of several field behaviors. The aim of this methodological and theoretical review is to explore the empirical factors influencing unsafe behaviors and accidents on construction sites. In this work, results and findings from 56 related previous studies were investigated. These studies were categorized based on their design, type, methods of data collection, analytical methods, variables, and key findings. A qualitative content analysis procedure was used to extract variables, themes, and factors. In addition, all studies were reviewed to determine the quality rating and to evaluate the strength of provided evidence. The content analysis identified 8 main categories: (a) society, (b) organization, (c) project management, (d) supervision, (e) contractor, (f) site condition, (g) work group, and (h) individual characteristics. The review highlighted the importance of more distal factors, e.g., society and organization, and project management, that may contribute to reducing the likelihood of unsafe behaviors and accidents through the promotion of site condition and individual features (as proximal factors). Further research is necessary to provide a better understanding of the links between unsafe behavior theories and empirical findings, challenge theoretical assumptions, develop new applied theories, and make stronger recommendations.

Research paper thumbnail of Occupational Cognitive Failures and Safety Performance in the Workplace

International Journal of Occupational Safety and Ergonomics, 2014

Introduction. The majority of industrial accidents occur because of human errors. Human error has... more Introduction. The majority of industrial accidents occur because of human errors. Human error has different causes, however, in all cases cognitive abilities and limitations of human play an important role. Occupational cognitive failures are cognitively-based human errors that occur at work. The aim of this study was to examine the relationship between occupational cognitive failures and safety consequences. Method. Personnel of a large industrial company in Iran filled out an occupational cognitive failure questionnaire (OCFQ) and answered questions on accidents. Univariate and multiple logistic regression analysis were used to determine the relationship between cognitive failures and safety consequences. Results. According to developed regression models, personnel with a high rate of cognitive failure, in comparison to low rate, have a high risk of minor injury involvement (OR 5.1, 95% CI [2.62, 10.3]); similar results were for major injury and near miss. Discussion. The results of this study revealed usefulness of the OCFQ as a tool of predicting safetyrelated consequences and planning preventive actions.

Research paper thumbnail of The survey of relationship between occupational cognitive failures and safety performance among bus drivers

Research paper thumbnail of Identifying individual and work-related risk factors of musculoskeletal disorders in an industrial organization

Research paper thumbnail of Why construction workers involve in unsafe behaviors? Part A: A qualitative research

Research paper thumbnail of Health, Safety and Environment (HSE) assessment of neighborhoods: A case study in Tehran Municipality

Urbanization is growing rapidly in recent centuries. This phenomenon can cause many changes in va... more Urbanization is growing rapidly in recent centuries. This phenomenon can cause many changes in various aspects of human life including the economy, education and public health This study was conducted to assess the Health, Safety and Environment (HSE) problems in Tehran neighborhoods. A new instrument was developed based on the results of a literature review and formulated during a pilot study. Through cluster sampling, 10 neighborhoods were selected based from 374 neighborhoods of Tehran. Six observers completed observational items during the field studies. Secondary data were used to obtain non-observation characteristics. Standard descriptive statistics were used to compare the HSE characteristics in sampled neighborhoods. Furthermore, control chart was used to as a decision rule to identify specific variation among sampled neighborhoods. Niavaran neighborhood had the best HSE status (52.80%±25.03) whereas Khak Sefid neighborhood had the worst one (20.09%±27.51). Standard deviations of HSE characteristics were high in different parts of a neighborhood. Statistical analysis indicated that significant differences in HSE characteristics exist among sampled neighborhoods. HSE status was in warning situation in both rich and poor neighborhoods. Community-based interventions were suggested as health promotion programs to involve and empower people in neighborhoods.

Research paper thumbnail of Development of an Occupational Cognitive Failure Questionnaire (OCFQ): Evaluation validity and reliability

Research paper thumbnail of Development and evaluation of a new questionnaire for rating perceived participation1

Clinical Rehabilitation, 2007

Cognitive-based human errors have major contribution to performance and safety in working environ... more Cognitive-based human errors have major contribution to performance and safety in working environment. This study designed to develop a measurement tool in order to evaluate this type of errors in the occupational settings. An Occupational Cognitive Failure Questionnaire (OCFQ) was developed. Content validity of the OCFQ was performed using a quantitative approach. Reliability of questionnaire was assessed by internal consistency and test-retest methods. A preliminary list of 35-items was prepared as a starting point. After evaluation of validity, five items were rejected. The new measurement instrument with 30-items was finally developed. The content validity index (CVI) for the final OCFQ was found acceptable (CVI=0.7). Results show that final OCFQ was internally consistent (α=96) and intraclass correlation coefficients (ICC) was 0.99. Measurement of cognitive failure in the workplace requires a valid and reliable tool. In respect to probable outcomes of cognitive failures occurrence at work, the present study suggested that OCFQ would be a useful instrument for measurement of cognitive failure in the working environment.

Research paper thumbnail of The Role of HSE management System in Improving health, safety and environment performance in an Oil Organization