Psychometric properties of the Persian version of Neal and Griffin's safety performance scale.

Introduction. Neal and Griffin's safety performance scale is an appropriate tool to evaluate safety performance. This article was validated and relied on the Persian version of Neal and Griffin's scale as the widely used tool to assess safety performance. Methods. Neal and Griffin's scale has eight questions and two dimensions - safety compliance and safety participation. A back-forward method was used to translate the original English version into Persian. A total of 161 employees of a petrochemical complex were selected for data collection. Content validity, Cronbach's α and split-half methods, concurrent validity and confirmatory factor analysis were used for psychometric evaluation. Results. The content validity index and content validity ratio were 0.82 and 0.84, respectively. Cronbach's α for total items was 0.9, indicating a high consistency. Additionally, Cronbach's α values for safety compliance and safety participation were 0.87 and 0.83, respectively. Spearman's correlation coefficients indicated a positive correlation between safety performance and safety culture items (r = 0.182-0.852, p < 0.01). Goodness-of-fit indexes in the default model had poor values. Thus, these values were improved in the modified model. Conclusion. The results demonstrated that Neal and Griffin's scale could be a reliable tool to evaluate preventive measures of safety performance among Iranian workers.