Industrial/Organizational Psychology applies scientific principles to maximize employee and organizational effectiveness in the workplace. Some key areas I/O psychologists focus on include selection and placement of employees, training and development programs, performance management, organization development, and workplace quality of life. I/O psychologists also study ergonomics and work environment factors like noise, lighting, temperature and their impact on psychological and physical worker conditions. The goal is to design jobs, equipment, and work systems that allow humans to perform effectively while improving worker satisfaction and productivity.