This study aims to empirically test the impact of the Motivation-Ability-Opportunity- (MAO) model on knowledge work. We propose that knowledge work is a function of employees’ motivation, ability and opportunity. In this regard, the aim is to provide empirical support to explain the effects of motivation, ability and opportunity on knowledge-work, which we defined as a knowledge-centered behavior. Data was collected through a self-report questionnaire. A sample size of 350 employees of Ferdowsi University of Mashhad answered the questionnaire. Structural equation modeling techniques and hierarchical multiple regression analyses were conducted on hypothesis testing. The findings confirm that motivation, ability and opportunity independently influence knowledge-work behavior. Also, results revealed that both intrinsic and extrinsic motivation has significant influence on knowledge work; however intrinsic motivation has a higher effect than extrinsic motivation.

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