The authors investigated the social significance of human smiles, spec
ifically the penchant for transgressors who smile to be judged more le
niently than those who do not. Of particular interest was whether diff
erent types of smiles generate different degrees of leniency and what
mediated the effect. Subjects judged a case of possible academic misco
nduct. Materials included a photograph of a female target displaying a
neutral expression, felt smile, false smile, or miserable smile. Smil
ing targets received more leniency than nonsmiling targets, although t
hey were not seen as less guilty. The type of smile did not significan
tly moderate the amount of leniency shown. Of the variables evaluated
for mediating the smile-leniency effect, such as perceiving the target
as more likable, submissive, or diplomatic, the one that best account
ed for the effect was perceiving the target as a trustworthy person. T
he implication seems to be-if in trouble, smile.