Assessments of job satisfaction became commonplace in the 1930s. In 1934, R.S. Uhrbrock was one of the first psychologists to use new techniques to assess factory worker attitudes. In 1935, R. Hoppock published a study of 500 teachers on how satisfied they were with their jobs. This study found that job satisfaction is affected by the work, the coworkers, and the managers. Before the 1930s, not many job satisfaction studies were published.