Although relationships between co-rumination and depressive symptoms have often been found, little research attention has been given to mechanisms underlying this association. The current study investigated brooding rumination as a mediator of the relationship between co-rumination and depressive symptoms. Analyses were performed on data of 1549 adolescents (53.4% girls; M_age = 12.93, range 9–17) using three waves of data with 1-year intervals. Mediated and indirect effects were investigated by means of cross-lagged analyses. The results indicated that co-rumination was not predictive of depressive symptoms 2 years later. However, co-rumination did have an indirect effect on prospective depressive symptoms through brooding rumination. Additional analyses looking into the directionality of effects showed that neither brooding rumination nor depressive symptoms were predictive of relative increases in one’s tendency to co-ruminate. Multi-group analyses further showed that findings were not moderated by gender or age. The current study contributes to the growing literature on the role of interpersonal and intrapersonal affect-regulation styles in predicting depressive symptoms and suggests that passive and catastrophic problem talk with same-sex friends may get internalized into maladaptive and repetitive thinking patterns.

尽管人们经常发现共同思考与抑郁症状之间的关系，但很少有人对此基础的机制进行研究。当前的研究调查了沉思沉思作为共沉与抑郁症状之间关系的中介。对1549名青少年（53.4％的女孩；M_年龄）的数据进行了分析 = 12.93，范围为9–17），每隔一年使用三波数据。通过交叉滞后分析研究了介导和间接作用。结果表明，共同思考不能预测2年后的抑郁症状。但是，共同反省确实通过育雏反省对预期的抑郁症状有间接影响。进一步分析影响的方向性表明，沉思的沉思和抑郁的症状都不能预示一个人共沉思倾向的相对增加。多组分析进一步表明，研究结果并未按性别或年龄进行审核。