Social support and integration have been linked to health and longevity in
many correlational studies. To explain how social relationships might enhan
ce health, investigators are examining the effects of social support on phy
siological processes implicated in disease. Much of this research focuses o
n testing the social support-reactivity hypothesis, which maintains that so
cial support enhances health by reducing psychobiologic reactivity to stres
sors. This article identifies the basic assumptions, problems, and prospect
s of this research endeavor The major problems discussed include: (a) incon
sistent findings across studies; (b) unidentified cognitive and emotional m
ediators; (c) individual differences in response to social support and (d)
a lack of experimental studies on the role of social support in adjustment
to chronic stress. Besides raising consciousness about these problems, I of
fer ideas for advancing research in this area.