What accounts for the sex difference in depression that emerges during the
period of adolescence? We propose that females become more depressed than m
ales lit adolescence partly as a consequence of their involvement in romant
ic relationships. Using two waves of data from the National Longitudinal St
udy of Adolescent Health (N = 8,181), a study which began interviewing resp
ondents in 1994, we compare change in levels of depression for adolescents
with and without romantic involvement between interviews. Our results sugge
st that males and females who become romantically involved between intervie
ws experience a larger increase in depression than their counterparts who d
o not; however, females experience a larger increase in depression than mal
es in response to romantic involvement. Our results suggest that females '
greater vulnerability to romantic involvement explains a large part of the
emerging sex difference in depression during adolescence.