Ma. Hecht et M. Lafrance, LICENSE OR OBLIGATION TO SMILE - THE EFFECT OF POWER AND SEX ON AMOUNT AND TYPE OF SMILING, Personality & social psychology bulletin, 24(12), 1998, pp. 1332-1342
This experiment tested whether social power and sex affect amount and
type of smiling. Participants were assigned to low-, high-, or equal-p
ower positions and interacted in dyads. For high- and equal-power part
icipants, smiling correlated with positive affect, whereas for low- po
wer participants, it did not. Women smiled more than men overall and s
howed more Duchenne smiling in the equal-power context, but they did n
ot differ in the high-power context or low-power context. Results are
interpreted as reflecting the license given to high-power people to sm
ile when they are so inclined and the obligation for low-power people
to smile regardless of how positive they feel.