en Examining the Relationship between Rumination and Job Involvement, Organizational Citizenship Behavior, with the Mediating Role of Grit تخصصي Special پژوهشي Research <div dir="ltr" style="text-align: justify;">This study explored the relationship between rumination and job involvement, organizational citizenship behavior, with the mediation of grit. The statistical sample of the research consisted of 300 employees of Iran Oil Pipelines and Telecommunications Company in the Lorestan region, selected through stratified random sampling method. The instruments included mental rumination questionnaire (Nolen-Hooksima et al., 1991), grit questionnaire (Duckworth and Quinn, 2009), job involvement questionnaire (Lodahl & Kejnar, 1965), and organizational citizenship behavior (OCB) questionnaire (Lee and Allen, 2002). Data were analyzed via Structural Equation Modeling (SEM) using SPSS version 26 and AMOS version 22. The proposed model was tested through structural equation modeling. According to the findings, the proposed model was fitted to the data. The results indicated a direct negative effect of rumination along with an indirect effect through grit on both job involvement and organizational citizenship behavior. Based on the findings of the present study, which highlight the importance of grit in enhancing organizational citizenship behavior and job involvement, as well as the negative influence of rumination on organizational outcomes, it is recommended that organizations provide training programs for employees focused on developing grit and managing rumination.</div> <div style="text-align: justify;">This study explored the relationship between rumination and job involvement, organizational citizenship behavior, with the mediation of grit. The statistical sample of the research consisted of 300 employees of Iran Oil Pipelines and Telecommunications Company in the Lorestan region, selected through stratified random sampling method. The instruments included mental rumination questionnaire (Nolen-Hooksima et al., 1991), grit questionnaire (Duckworth and Quinn, 2009), job involvement questionnaire (Lodahl & Kejnar, 1965), and organizational citizenship behavior (OCB) questionnaire (Lee and Allen, 2002). Data were analyzed via Structural Equation Modeling (SEM) using SPSS version 26 and AMOS version 22. The proposed model was tested through structural equation modeling. According to the findings, the proposed model was fitted to the data. The results indicated a direct negative effect of rumination along with an indirect effect through grit on both job involvement and organizational citizenship behavior. Based on the findings of the present study, which highlight the importance of grit in enhancing organizational citizenship behavior and job involvement, as well as the negative influence of rumination on organizational outcomes, it is recommended that organizations provide training programs for employees focused on developing grit and managing rumination.</div> rumination, job involvement, organizational citizenship behavior, grit rumination, job involvement, organizational citizenship behavior, grit 0 0 http://ijpb.ir/browse.php?a_code=A-10-371-1&slc_lang=en&sid=1 Seyed mohammadjavad Mousavinia Seyed mohammadjavad Mousavinia 10031947532846004696 10031947532846004696 No Department of Psychology, Faculty of Educational Sciences & Psychology, Shahid Chamran University of Ahvaz, Ahvaz, Iran Department of Psychology, Faculty of Educational Sciences & Psychology, Shahid Chamran University of Ahvaz, Ahvaz, Iran Mostafa Asheghi Mostafa Asheghi asheghimostafa@gmail.com 10031947532846004697 10031947532846004697 Yes Department of Psychology, Faculty of Educational Sciences & Psychology, Shahid Chamran University of Ahvaz, Ahvaz, Iran. Department of Psychology, Faculty of Educational Sciences & Psychology, Shahid Chamran University of Ahvaz, Ahvaz, Iran. Abdolzahra Naami Abdolzahra Naami 10031947532846004698 10031947532846004698 No Department of Psychology, Faculty of Educational Sciences & Psychology, Shahid Chamran University of Ahvaz, Ahvaz, Iran. Department of Psychology, Faculty of Educational Sciences & Psychology, Shahid Chamran University of Ahvaz, Ahvaz, Iran.