During the course of the National Longitudinal Study of the High School Class of 1972 (NLS), a tremendous amount of data will be collected on the educational, vocational, and personal development of high school graduates, and the personal, familial, social, institutional, and cultural factors that contribute to that development. Information of a correlational nature collected on a broad and representative sample of persons is available for use in establishing normative information and in providing construct validation for tightly controlled experiments conducted on an unrepresentative sampling of persons--e.g. college sophomores. These data are potentially most useful to psychologists and other researchers for generating hypotheses. The scope of the NLS survey is described briefly, as are the results on self-esteem and locus of control obtained from an analysis of the NLS data. The issues which can be studied by using NLS data on self-esteem and locus of control are also discussed. (Author/EVH)