Book excerpt: Even though project-management researchers have become increasingly interested in factors that may have an impact on project-management effectiveness, their efforts fall short of addressing the "human factor." And, unfortunately, many project-management scholars are largely unaware of the I/O psychology literature--relying, for example, on outdated models of motivation and team development. On the other side, I/O psychologists who research groups and teams often ignore the contextual influences--such as business sector, project type, placement in the organizational hierarchy, and project phase and maturity--that have a crucial impact on how a project will unfold. In this volume, a cross-disciplinary set of editors will bring together perspectives from leading I/O psychology and project-management scholars.