Furthermore, from Stone, Hankin, Gibb and Abela (2011) study shown that baselines level of co-rumination can predicted the time of depression onset; a higher level of co-rumination will correlate with a longer, more serious episode, which will have preserved after rumination and depressive symptoms were covaried. Therefore, co-rumination is an important risk factor that can predict depressive symptoms. From Byrd-Craven, Granger and Auer (2011) work found that co-rumination can predict the response of cortisol and when people focusing on their negative feeling, it will lead to the increase the response of cortisol and sympathetic nervous system(sAA). It may explain the mechanism behind why co-rumination may lead to depression onset.
Co-rumination
Co-rumination