LAUSR

Social comparison processes between siblings play an important role in the ways siblings influence one another at younger ages, but to our knowledge, no studies have examined social comparison processes between siblings in mid- to later life. The current study examined (1) factors associated with the propensity for social comparisons with a sibling and (2) how social comparison is linked to well-being and sibling relationship quality. Data came from 491 adults from across the United States ( M age = 58.96, SD = 6.25; 68% female). Results indicated that adults who are the same sex as their sibling are more likely to engage in social comparison with their sibling. Additionally, an inclination for social comparison with a sibling was linked to more depressive symptoms, more sibling conflict, and greater sibling closeness. Overall, comparison with a sibling in adulthood may be linked to both positive and negative outcomes.