Industrial and organizational psychology (also known as I/O psychology or work psychology) is the scientific study of employees, workplaces, and organizations. Industrial and organizational psychologists contribute to an organization's success by improving the workplace and the performance, satisfaction and well-being of its people. An I/O psychologist researches and identifies how employee behaviors and attitudes can be improved through hiring practices, training programs, and feedback and management 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.An applied science, I–O psychology is represented by Division 14 of the American Psychological Association, known formally as the Society for Industrial and Organizational Psychology (SIOP).OverviewIn classic overviews of the field, Guion (1965) defines I–O psychology as "the scientific study of the relationship between man and the world of work:... in the process of making a living" (p. 817). Blum & Naylor (1968) define it as "simply the application or extension of psychological facts and principles to the problems concerning human beings operating within the context of business and industry" (p. 4). As evident by its name, I–O psychology has historically subsumed two broad areas of study that investigate the nature of the person (individual-differences psychology) and the nature of the situation or context (social psychology), although this distinction is artificial, as many topics in I-O psychology are informed by both of these general areas. Sometimes, I–O psychology is considered a sister field or branch of organizational studies, organizational science, organizational behavior, human resources, and/or management, but there is no universally accepted classification system for these related fields.