A field of applied psychology in which the results of basic and applied research into the well-being and efficiency of people in work is applied to problems arising in industry and in non-industrial organizations. Work in this field focuses on vocational guidance and selection, problems of work motivation and job satisfaction, absenteeism in organizations, improvement of communication within organizations, design and implementation of training courses, teaching of social and human relations skills, improvement of promotion structures, evaluation of job performance, and problems of safety and welfare. Its major branches are personnel psychology, ergonomics or human factors psychology, and organizational psychology. It corresponds roughly to occupational psychology, the term often preferred in the UK and the rest of Europe, and it falls under the umbrella of work psychology. I/O psychology abbrev.