Super (1990) proposed that the psychological determinants of career development attitudes are time perspective, self-esteem, and causal attributions. The present study analyzed the effects of these determinants on the career development attitudes of 320 students from grade 9 and 300 students from grade 12. The analysis of the data using structural equations modeling (LISREL) showed both similarities and differences in the effects of the determinants of career attitudes between the two grade levels. The results are discussed in the context of the career maturity model. (Contains 1 table and 3 figures.)