One of the fundamental problems of sociology and social psychology is to determine the effect of various social conditions on the personalities of the members of a society. The impress of social variables upon the individual can be observed and classified from a number of different aspects. One of the most important of these, especially in a mobile, industrial, and stratified society, is socio-economic status. It is the purpose of this paper to consider the relationship of socio-economic status to achievement test and personality inventory scores, as found among sixth-grade public school children in St. Cloud, Minnesota. Before reporting the findings of this study, a brief survey of the pertinent literature will be made.