“…Herzberg (1966), Davis (1966), Davis and Valfer (1965,1966), and Emery, Thorsrud, and Lange (1966) represent the groups which have worked longest on horizontal and vertical job enlargement. All, together with Ford (1969), Sorcher (1967), and Paul, Robertson, and Herzberg (1969), have concluded that through the design of jobs that permit increased self-regulation, self-evaluation, self-adjustment, and participation to set goals, increases have been produced in productivity and positive attitudes.…”