Psychological Capital and Organizational Citizenship Behaviors of Construction Workers: The Mediating Effect of Prosocial Motivation and the Moderating Effect of Corporate Social Responsibility.

Due to construction industry projects' large-scale, long-period, and outdoor operation characteristics, employees' organizational citizenship behavior (OCB) plays an essential role in cost-saving, high-efficiency, and environmentally friendly development strategies. This study discusses how to improve employees' OCB from two levels of employees' psychological factors and corporate social responsibility (CSR) at the organizational level. We verified this study's hypotheses based on 336 valid questionnaires collected from 56 teams. The results indicated that (1) positive psychological capital (PsyCap) was a positive predictor of employees' OCB; (2) PsyCap was positively related to employees' prosocial motivation, and prosocial motivation partially mediated the relationship between PsyCap and employees' OCB; and (3) CSR moderated the relationship between PsyCap and prosocial motivation and played a significant moderating role between prosocial motivation and OCB. These findings provide an empirical research basis for the theories of conservation of resources (COR), self-determination, and affective events. This research also has managerial implications for improving employees' OCB in the construction industry.