The goal of the present study was to examine the relationship between socia
l motives, emotional feelings, and smiling, with a view to demonstrating th
at smiling is determined by both factors but in different ways. To vary soc
ial motives, the authors manipulated two aspects of social context. Pairs o
f friends performed either the same or a different task in either the same
or a different room, whereas a control group participated in the experiment
alone. To vary emotional feelings,participants viewed each of two film cli
ps that differed with respect to the intensity of positive emotional feelin
gs they evoked. Dependent variables included facial activity, as measured b
y the Facial Action Coding System (FACS), self-reported emotional feelings,
and measures of social motives. As predicted, both emotional feelings and
social motives affected facial activity. The relevance of the results for t
heories of facial displays is discussed.