“…In this study (Rose, 2002), a survey measure of co-rumination with same-sex friends was developed with third-, fifth-, seventh-, and ninth-grade youths. Consistent with research indicating that selfdisclosure is linked with high-quality friendships (e.g., Camarena, Sarigiani, & Peterson, 1990;Parker & Asher, 1993), co-rumination was positively related to having high-quality, close friendships. However, consistent with research indicating that solitary ruminating is related to emotional problems (e.g., Nolen-Hoeksema, Morrow, & Fredrickson, 1993;Nolen-Hoeksema, Parker, & Larson, 1994;Schwartz & Koenig, 1996), co-rumination also was related to higher internalizing symptoms (i.e., depressive and anxiety symptoms).…”