The relative contribution of a variety of variables to different self-concept sub-constructs requires further exploration despite the existence of vast research about overall self-regard. The contributions of demographic, achievement, achievement motivation, and school self-concept dimensions to the prediction of the physical, moral-ethical, personal, family, social and total self of a group of high school students (N=98) was examined to explore different dimensions of self-concept. Students in a summer Upward Bound Program completed the Tennessee Self Concept Scale, the Self Concept and Motivation Inventory (SCAMIN), the California Achievement Test, and a demographic data sheet. Demographic variables contributed most to the prediction of family self and moral-ethical self, while achievement variables contributed to prediction of social self. The achievement motivation and self-concept variables accounted for over half of the variance in predicting the Total Self scales. The SCAMIN and Tennessee Self Concept Scale, although exhibiting high reliability, tended to measure different constructs of self-concept. (NRB)