The relations among depressive symptoms, self-esteem, and optimism during adolescence: Longitudinal evidence from nine countries.

Previous research has suggested bidirectional relations between depressive symptoms and both internal and external core beliefs (self-esteem and optimism, respectively) in adolescence. However, little work has examined the cultural commonality versus specificity of these developmental pathways in adolescence across diverse contexts. To address this gap, the current study traced bidirectional associations among depressive symptoms and two forms of core beliefs (self-esteem and optimism) in adolescents from 12 cultural groups in nine countries. Longitudinal data were collected from 1,090 adolescents at ages 15 and 17. Significant associations emerged between age 15 depressive symptoms and both age 17 core beliefs across all cultural groups except Sweden. No significant associations between age 15 core beliefs and age 17 depressive symptoms were found in the multigroup model. However, the pathways from core beliefs to depressive symptoms and from depressive symptoms to core beliefs did not significantly differ in strength. These findings provide cross-cultural evidence for the scar theory (depressive symptoms → core beliefs), but no clear support for the vulnerability theory (core beliefs → depressive symptoms), perhaps due to the measurement and stability of depression. These findings have implications for understanding the adolescent development of psychopathology and cognitions, such as core beliefs, across diverse cultures.