“…On a first level of evidence for interdependence, research on nonspousal caregiving dyads has shown that good psychological functioning of care recipients, and specific personality traits and intellectual abilities of both caregivers and care recipients (i.e., intrapersonal variables) might impact reciprocal emotional and relational wellbeing of dyad members (Hollis-Sawyer, 2001;Kim et al, 2008;Romano et al, 2020). Moreover, one element of dyadic interdependence strongly reported in a number of studies synthesized in this review was relationship processes (i.e., interpersonal variables) such as communication patterns and dyadic behavioral responses to care may be associated with different levels of dyad members' wellbeing (e.g., quality of life, caregiver burden, depressive symptoms, and relationship quality) (Martini et al, 2001;Heid et al, 2016;Shawler et al, 2018;Bouldin et al, 2019). In line with studies investigating relationship processes of spouses dealing with various illnesses (Laurenceau et al, 1998;Lepore, 2004;Manne and Badr, 2008;Hagedoorn et al, 2011b), our findings suggest that, for example, a shared perception of the quality of the caregiving relationship as well as collaboration, open communication, and positive dyadic responses to care might increase wellbeing outcomes for both members of non-spousal caregiving dyads (Heid et al, 2016;Shawler et al, 2018;Bouldin et al, 2019).…”