“…Three studies found mediation for some of the transitions or some of the outcomes but not all (Bachman et al, ; Sun & Li, ; Vargas, Roosa, Knight, & O'Donnell, ). The overwhelming majority of the studies with family functioning and parenting mediating variables, however, found no evidence that these variables were mediators during adolescence (Bachman et al, ; Krohn, Penly Hall, & Lizotte, ; Langenkamp & Frisco, ; Schroeder et al, ; Shaff et al, ; Walper et al, ; Zito, ; Zito & De Coster, ). Finally, no studies suggested that parent functioning was a consistent mediator: Bachman et al () found that parents' psychological distress was a mediator only for cohabiting relationships lasting at least 2 years; and neither Bachman et al () nor Zito () found any mediation effect by parent functioning.…”