The current study aimed to investigate whether the samples academic achievement can be predicted by the direct and indirect influences of the independent variables: shyness, uncertainty avoidance, and risk taking. The sample consisted of two groups: 77 Omani university students, and 68 non-Omani university students. The study applied Darwish's (2000) uncertainty avoidance scale, and Goss, Gilbert and Allan (1994) shame scale (ISS), while the risk taking scale was constructed by the researcher. Additionally, path analysis was used to test the study hypotheses. Results concluded that shyness (5%, p <.01), uncertainty avoidance (5%, p <.01), and risk taking (16%, p <.01) were all significant negative predictors of academic achievement. As for gender and nationality, results did not indicate an influence on academic achievement (p >.05).