Fake smiles can be done with feeling

[image error]The 'Duchenne smile' is thought to be a largely unfakeable expression of pleasure that involves a signature 'crinkling around the eyes' caused by automatic muscles. A new study covered by PsyBlog pours cold water on this popular idea by reporting that most people can produce undetectable fake smiles that involve these supposedly involuntary movements.

It has been suggested that 80% of us are unable to conjure up a fake smile that will trick others because we don't have voluntary control over...