ABSTRACT
THE general improvement in output of the Relay Assembly Test Room operators was thought by some of the investigators to be closely associated with gradual changes in the direction of improved social conditions of work. Frequently in human and social situations the introduction of a single change brings in its train a host of other unexpected changes. The Relay Assembly Test Room was no exception to this rule. In setting the conditions for the test, numerous changes were brought about which at first either were taken for granted or were passed by unnoticed. The most important of these inadvertently introduced changes was the new method of supervision.
