The human aspect of industry has changed very considerably in the last fifty years. The nature and range of these changes are still partly unknown to… - Elton Mayo

The history of the twelve-week return to the so-called original conditions of work is soon told. The daily and weekly output rose to a point higher than at any other time and in the whole period "there was no downward trend." At the end of twelve weeks, in period thirteen, the group returned, as had been arranged, to the conditions of period seven with the sole difference that whereas the Company continued to supply coffee or other beverage for the mid-morning lunch, the girls now provided their own food. This arrangement lasted for thirty-one weeks—much longer than any previous change. Whereas in period twelve the group's output had exceeded that of all the other performances, in period thirteen, with rest-pauses and refreshment restored, their output rose once again to even greater heights

The statements of academic psychology often seem to imply that logical thinking is a continuous function of the mature person — that the sufficiently normal infant develops from syncretism and non-logic to logic and skilled performance. Such a description seems to be supported by much of the work of Piaget, of Claparede, and, with respect to the primitive, by Levy-Bruhl. If one examines the facts with care, either in industry or in clinic, one finds immediately that this implication, so flattering to the civilized adult, possesses only a modicum of truth. Indeed, one may go further and say that it is positively misleading.

Viewed from the standpoint of social science, society is composed of individuals organized in occupational groups, each group fulfilling some function of the society. Taking this fact into account, psychology – the science of human nature and human consciousness – is able to make at least one general assertion as to the form a given society must take if it is to persist as a society. It must be possible for the individual as he works to see that his work is socially necessary; he must be able to see beyond his group to the society.