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ABSTRACT
The primary objective of this study is to examine the influence that psychological factors have on project team members’ degree of over-optimism regarding successful project completion. Specifically, we examine the impact that select personality traits and psychological states have on project team members’ degree of over-optimism about bringing a project to a successful completion. A field survey methodology was employed to survey IT project team members from Fortune 500 companies and the research model was tested using structural equation modeling. Results indicate that project-specific self-efficacy has both a direct positive effect on over-optimism and an indirect effect via the implementation mindset construct. General self-efficacy was demonstrated to directly influence project-specific self-efficacy and indirectly influence over-optimism via the implementation mindset construct. Preference for consistency was also demonstrated to have a direct effect on over-optimism. Implications for developing interventions to minimize the impacts of over-optimism related to IT projects are discussed.