Early adversity and depressive symptoms among early adolescent girls: the mediating role of exposure to recent interpersonal acute stress.

Early adversity confers risk for depression in part through its association with recent (i.e., proximal) acute stress. However, it remains unresolved whether: a) early adversity predicts increases in recent acute stress over time; b) all - or only certain types - of recent events mediate the relationship between early adversity and depression; and c) early adversity places individuals at greater risk for depression via greater exposure to independent (i.e., fateful) interpersonal events or via greater generation of dependent (i.e., partially self-initiated) interpersonal events (i.e., stress generation) or both. These questions were examined in a 3-wave longitudinal study of early adolescent girls (N = 125; M = 12.35 years [SD = .77]) with no history of diagnosable depression using contextual life stress and diagnostic interviews. Path analyses indicated that increases in past-year acute interpersonal, but not non-interpersonal, stress mediated the link between early adversity and depressive symptoms. The mediating role of interpersonal events was limited to independent ones, suggesting increases in interpersonal event exposure, not interpersonal stress generation, acted as a mediator. Finally, findings support prior evidence that early adversity may not directly predict future depressive symptoms. Implications for understanding the role of recent stress in the association between early adversity and adolescent depression are discussed.

The Interplay between Reward-Relevant Life Events and Trait Reward Sensitivity in Neural Responses to Reward Cues.

The reward hypersensitivity model posits that trait reward hypersensitivity should elicit hyper/hypo approach motivation following exposure to recent life events that activate (goal-striving and goal-attainment) or deactivate (goal-failure) the reward system, respectively. To test these hypotheses, eighty-seven young adults with high (HRew) versus moderate (MRew) trait reward sensitivity reported frequency of life events via the Life Event Interview. Brain activation was assessed during the fMRI Monetary Incentive Delay task. Greater exposure to goal-striving events was associated with higher nucleus accumbens (NAc) reward anticipation among HRew participants and lower orbitofrontal cortex (OFC) reward anticipation among MRew participants. Greater exposure to goal-failure events was associated with higher NAc and OFC reward anticipation only among HRew participants. This study demonstrated different neural reward anticipation (but not outcome) following reward-relevant events for HRew versus MRew individuals. Trait reward sensitivity and reward-relevant life events may jointly modulate reward-related brain function, with implications for understanding psychopathology.

Intergenerational Transmission of Rumination via Parenting Behaviors and Family Characteristics: The Impact on Adolescent Internalizing Symptoms.

The relationship between rumination and internalizing psychopathology across the lifespan is robustly documented, yet the development of rumination is not well understood. In a prospective study of adolescents (N = 629, M age = 13.05 years, 51.5% female, 48.3% African American/Black) and their primary female caregivers (90.6% biological mothers), self-report measures of rumination, parental behaviors, family characteristics, and internalizing symptoms were completed. Maternal rumination was not predictive of adolescent rumination, but was associated with less effective parenting and maladaptive family characteristics. Neither parenting behaviors nor family characteristics predicted adolescent rumination. The indirect effects of maternal rumination on adolescent rumination through parenting behaviors and family characteristics were non-significant. The well-established relationship between adolescent rumination and internalizing symptoms was replicated, but there was no evidence of the intergenerational process impacting these symptoms. The findings do not support intergenerational transmission of rumination via parenting behaviors and family characteristics.

Linking Maternal Depression to Adolescent Internalizing Symptoms: Transmission of Cognitive Vulnerabilities.

The mechanisms of the well-documented relationship between maternal depression and offspring psychopathology are not yet fully understood. Building upon cognitive theories of depression and the modeling hypothesis, path analyses tested whether maternal depression history predicted adolescent internalizing symptoms via the transmission of cognitive vulnerabilities within a sample of 635 adolescents (Mage = 13.1 years, range = 11.2-17.2 years; 53% female; 48% African American/Black) and their primary female caregivers. Maternal depression history did not directly predict adolescent symptoms. Two significant indirect effects were found; maternal depression history was associated with maternal negative cognitive style, which predicted greater adolescent negative generalization, which, in turn, predicted adolescents' greater depressive and anxiety symptoms. These findings suggest that the transmission of cognitive vulnerabilities may link maternal depression and offspring internalizing psychopathology.