Objectives: To examine the effects of organizational culture and job satisfaction on Organizational Citizenship Behavior (OCB), mediated by work motivation. Methods: Quantitative research using employee questionnaires, regression analysis, and mediation testing. Research Gap/Novelty: Integrates work motivation as a mediating mechanism linking organizational culture and job satisfaction to OCB. Results: Organizational culture and job satisfaction positively and significantly influenced work motivation and OCB. Work motivation significantly mediated both relationships. Conclusion: Supportive organizational culture and employee satisfaction strengthen work motivation, ultimately enhancing voluntary extra-role behavior and organizational effectiveness.
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