Industrial and organizational psychology (also known as I/O psychology, work psychology, or personnel psychology) is the scientific study of employees, workplaces, and organizations. Industrial and organizational psychologists contribute to an organization's success by improving the performance and well-being of its people. An I/O psychologist researches and identifies how behaviors and attitudes can be improved through hiring practices, training programs, and feedback systems. I/O psychologists also help organizations transition among periods of change and development. Industrial and organizational psychology is related to the concepts of organizational behavior and human capital.